diff --git a/native/markdown/rules.react.js b/native/markdown/rules.react.js
index 045cf65df..f926d1cfb 100644
--- a/native/markdown/rules.react.js
+++ b/native/markdown/rules.react.js
@@ -1,412 +1,416 @@
 // @flow
 
 import _memoize from 'lodash/memoize';
 import * as React from 'react';
 import { Text, View } from 'react-native';
 import { createSelector } from 'reselect';
 import * as SimpleMarkdown from 'simple-markdown';
 
 import { relativeMemberInfoSelectorForMembersOfThread } from 'lib/selectors/user-selectors';
 import * as SharedMarkdown from 'lib/shared/markdown';
 import type { RelativeMemberInfo } from 'lib/types/thread-types';
 
 import { useSelector } from '../redux/redux-utils';
 import MarkdownLink from './markdown-link.react';
 import MarkdownParagraph from './markdown-paragraph.react';
 import { getMarkdownStyles } from './styles';
 
 export type MarkdownRules = {
   +simpleMarkdownRules: SharedMarkdown.ParserRules,
   +emojiOnlyFactor: ?number,
   // We need to use a Text container for Entry because it needs to match up
   // exactly with TextInput. However, if we use a Text container, we can't
   // support styles for things like blockQuote, which rely on rendering as a
   // View, and Views can't be nested inside Texts without explicit height and
   // width
   +container: 'View' | 'Text',
 };
 
 // Entry requires a seamless transition between Markdown and TextInput
 // components, so we can't do anything that would change the position of text
 const inlineMarkdownRules: boolean => MarkdownRules = _memoize(useDarkStyle => {
   const styles = getMarkdownStyles(useDarkStyle ? 'dark' : 'light');
   const simpleMarkdownRules = {
     // Matches 'https://google.com' during parse phase and returns a 'link' node
     url: {
       ...SimpleMarkdown.defaultRules.url,
       // simple-markdown is case-sensitive, but we don't want to be
       match: SimpleMarkdown.inlineRegex(SharedMarkdown.urlRegex),
     },
     // Matches '[Google](https://google.com)' during parse phase and handles
     // rendering all 'link' nodes, including for 'autolink' and 'url'
     link: {
       ...SimpleMarkdown.defaultRules.link,
       match: () => null,
       react(
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) {
         return (
           <MarkdownLink
             key={state.key}
             style={styles.link}
             target={node.target}
           >
             {output(node.content, state)}
           </MarkdownLink>
         );
       },
     },
     // Each line gets parsed into a 'paragraph' node. The AST returned by the
     // parser will be an array of one or more 'paragraph' nodes
     paragraph: {
       ...SimpleMarkdown.defaultRules.paragraph,
       // simple-markdown's default RegEx collapses multiple newlines into one.
       // We want to keep the newlines, but when rendering within a View, we
       // strip just one trailing newline off, since the View adds vertical
       // spacing between its children
       match: (source: string, state: SharedMarkdown.State) => {
         if (state.inline) {
           return null;
         } else if (state.container === 'View') {
           return SharedMarkdown.paragraphStripTrailingNewlineRegex.exec(source);
         } else {
           return SharedMarkdown.paragraphRegex.exec(source);
         }
       },
       parse(
         capture: SharedMarkdown.Capture,
         parse: SharedMarkdown.Parser,
         state: SharedMarkdown.State,
       ) {
         let content = capture[1];
         if (state.container === 'View') {
           // React Native renders empty lines with less height. We want to
           // preserve the newline characters, so we replace empty lines with a
           // single space
           content = content.replace(/^$/m, ' ');
         }
         return {
           content: SimpleMarkdown.parseInline(parse, content, state),
         };
       },
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <MarkdownParagraph key={state.key} style={state.textStyle}>
           {output(node.content, state)}
         </MarkdownParagraph>
       ),
     },
     // This is the leaf node in the AST returned by the parse phase
     text: SimpleMarkdown.defaultRules.text,
   };
   return {
     simpleMarkdownRules,
     emojiOnlyFactor: null,
     container: 'Text',
   };
 });
 
 // We allow the most markdown features for TextMessage, which doesn't have the
 // same requirements as Entry
 const fullMarkdownRules: boolean => MarkdownRules = _memoize(useDarkStyle => {
   const styles = getMarkdownStyles(useDarkStyle ? 'dark' : 'light');
   const inlineRules = inlineMarkdownRules(useDarkStyle);
   const simpleMarkdownRules = {
     ...inlineRules.simpleMarkdownRules,
     // Matches '<https://google.com>' during parse phase and returns a 'link'
     // node
     autolink: SimpleMarkdown.defaultRules.autolink,
     // Matches '[Google](https://google.com)' during parse phase and handles
     // rendering all 'link' nodes, including for 'autolink' and 'url'
     link: {
       ...inlineRules.simpleMarkdownRules.link,
       match: SimpleMarkdown.defaultRules.link.match,
     },
     mailto: SimpleMarkdown.defaultRules.mailto,
     em: {
       ...SimpleMarkdown.defaultRules.em,
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <Text key={state.key} style={styles.italics}>
           {output(node.content, state)}
         </Text>
       ),
     },
     strong: {
       ...SimpleMarkdown.defaultRules.strong,
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <Text key={state.key} style={styles.bold}>
           {output(node.content, state)}
         </Text>
       ),
     },
     u: {
       ...SimpleMarkdown.defaultRules.u,
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <Text key={state.key} style={styles.underline}>
           {output(node.content, state)}
         </Text>
       ),
     },
     del: {
       ...SimpleMarkdown.defaultRules.del,
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <Text key={state.key} style={styles.strikethrough}>
           {output(node.content, state)}
         </Text>
       ),
     },
     spoiler: {
       order: SimpleMarkdown.defaultRules.paragraph.order - 1,
       match: SimpleMarkdown.inlineRegex(SharedMarkdown.spoilerRegex),
       parse(
         capture: SharedMarkdown.Capture,
         parse: SharedMarkdown.Parser,
         state: SharedMarkdown.State,
       ) {
         const content = capture[1];
         return {
           content: SimpleMarkdown.parseInline(parse, content, state),
         };
       },
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
-      ) => <Text key={state.key}>{output(node.content, state)}</Text>,
+      ) => (
+        <Text key={state.key} style={styles.spoiler}>
+          {output(node.content, state)}
+        </Text>
+      ),
     },
     inlineCode: {
       ...SimpleMarkdown.defaultRules.inlineCode,
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <Text key={state.key} style={styles.inlineCode}>
           {node.content}
         </Text>
       ),
     },
     heading: {
       ...SimpleMarkdown.defaultRules.heading,
       match: SimpleMarkdown.blockRegex(
         SharedMarkdown.headingStripFollowingNewlineRegex,
       ),
       // eslint-disable-next-line react/display-name
       react(
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) {
         const headingStyle = styles['h' + node.level];
         return (
           <Text key={state.key} style={[state.textStyle, headingStyle]}>
             {output(node.content, state)}
           </Text>
         );
       },
     },
     blockQuote: {
       ...SimpleMarkdown.defaultRules.blockQuote,
       // match end of blockQuote by either \n\n or end of string
       match: SharedMarkdown.matchBlockQuote(
         SharedMarkdown.blockQuoteStripFollowingNewlineRegex,
       ),
       parse: SharedMarkdown.parseBlockQuote,
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => {
         const { isNestedQuote } = state;
         const backgroundColor = isNestedQuote ? '#00000000' : '#00000066';
 
         return (
           <View
             key={state.key}
             style={[styles.blockQuote, { backgroundColor }]}
           >
             {output(node.content, { ...state, isNestedQuote: true })}
           </View>
         );
       },
     },
     codeBlock: {
       ...SimpleMarkdown.defaultRules.codeBlock,
       match: SimpleMarkdown.blockRegex(
         SharedMarkdown.codeBlockStripTrailingNewlineRegex,
       ),
       parse(capture: SharedMarkdown.Capture) {
         return {
           content: capture[1].replace(/^ {4}/gm, ''),
         };
       },
       // eslint-disable-next-line react/display-name
       react: (
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) => (
         <View key={state.key} style={styles.codeBlock}>
           <Text style={[state.textStyle, styles.codeBlockText]}>
             {node.content}
           </Text>
         </View>
       ),
     },
     fence: {
       ...SimpleMarkdown.defaultRules.fence,
       match: SimpleMarkdown.blockRegex(
         SharedMarkdown.fenceStripTrailingNewlineRegex,
       ),
       parse: (capture: SharedMarkdown.Capture) => ({
         type: 'codeBlock',
         content: capture[2],
       }),
     },
     json: {
       order: SimpleMarkdown.defaultRules.paragraph.order - 1,
       match: (source: string, state: SharedMarkdown.State) => {
         if (state.inline) {
           return null;
         }
         return SharedMarkdown.jsonMatch(source);
       },
       parse: (capture: SharedMarkdown.Capture) => {
         const jsonCapture: SharedMarkdown.JSONCapture = (capture: any);
         return {
           type: 'codeBlock',
           content: SharedMarkdown.jsonPrint(jsonCapture),
         };
       },
     },
     list: {
       ...SimpleMarkdown.defaultRules.list,
       match: SharedMarkdown.matchList,
       parse: SharedMarkdown.parseList,
       react(
         node: SharedMarkdown.SingleASTNode,
         output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
         state: SharedMarkdown.State,
       ) {
         const children = node.items.map((item, i) => {
           const content = output(item, state);
           const bulletValue = node.ordered ? node.start + i + '. ' : '\u2022 ';
           return (
             <View key={i} style={styles.listRow}>
               <Text style={[state.textStyle, styles.listBulletStyle]}>
                 {bulletValue}
               </Text>
               <View style={styles.insideListView}>{content}</View>
             </View>
           );
         });
 
         return <View key={state.key}>{children}</View>;
       },
     },
     escape: SimpleMarkdown.defaultRules.escape,
   };
   return {
     ...inlineRules,
     simpleMarkdownRules,
     emojiOnlyFactor: 2,
     container: 'View',
   };
 });
 
 function useTextMessageRulesFunc(
   threadID: ?string,
 ): (useDarkStyle: boolean) => MarkdownRules {
   return useSelector(getTextMessageRulesFunction(threadID));
 }
 
 const getTextMessageRulesFunction = _memoize((threadID: ?string) =>
   createSelector(
     relativeMemberInfoSelectorForMembersOfThread(threadID),
     (
       threadMembers: $ReadOnlyArray<RelativeMemberInfo>,
     ): (boolean => MarkdownRules) => {
       if (!threadID) {
         return fullMarkdownRules;
       }
       return _memoize<[boolean], MarkdownRules>((useDarkStyle: boolean) =>
         textMessageRules(threadMembers, useDarkStyle),
       );
     },
   ),
 );
 
 function textMessageRules(
   members: $ReadOnlyArray<RelativeMemberInfo>,
   useDarkStyle: boolean,
 ): MarkdownRules {
   const styles = getMarkdownStyles(useDarkStyle ? 'dark' : 'light');
   const baseRules = fullMarkdownRules(useDarkStyle);
   return {
     ...baseRules,
     simpleMarkdownRules: {
       ...baseRules.simpleMarkdownRules,
       mention: {
         ...SimpleMarkdown.defaultRules.strong,
         match: SharedMarkdown.matchMentions(members),
         parse: (capture: SharedMarkdown.Capture) => ({
           content: capture[0],
         }),
         // eslint-disable-next-line react/display-name
         react: (
           node: SharedMarkdown.SingleASTNode,
           output: SharedMarkdown.Output<SharedMarkdown.ReactElement>,
           state: SharedMarkdown.State,
         ) => (
           <Text key={state.key} style={styles.bold}>
             {node.content}
           </Text>
         ),
       },
     },
   };
 }
 
 let defaultTextMessageRules = null;
 
 function getDefaultTextMessageRules(): MarkdownRules {
   if (!defaultTextMessageRules) {
     defaultTextMessageRules = textMessageRules([], false);
   }
   return defaultTextMessageRules;
 }
 
 export {
   inlineMarkdownRules,
   useTextMessageRulesFunc,
   getDefaultTextMessageRules,
 };
diff --git a/native/markdown/styles.js b/native/markdown/styles.js
index a52cd0e60..b486145cd 100644
--- a/native/markdown/styles.js
+++ b/native/markdown/styles.js
@@ -1,105 +1,109 @@
 // @flow
 
 import _memoize from 'lodash/memoize';
 import { Platform } from 'react-native';
 
 import { getStylesForTheme } from '../themes/colors';
 import type { GlobalTheme } from '../types/themes';
 
 const unboundStyles = {
   link: {
     color: 'markdownLink',
     textDecorationLine: 'underline',
   },
   italics: {
     fontStyle: 'italic',
   },
+  spoiler: {
+    color: 'spoiler',
+    backgroundColor: 'spoiler',
+  },
   bold: {
     fontWeight: 'bold',
   },
   underline: {
     textDecorationLine: 'underline',
   },
   strikethrough: {
     textDecorationLine: 'line-through',
     textDecorationStyle: 'solid',
   },
   inlineCode: {
     backgroundColor: 'codeBackground',
     fontFamily: (Platform.select({
       ios: 'Menlo',
       default: 'monospace',
     }): string),
     fontSize: (Platform.select({
       ios: 17,
       default: 18,
     }): number),
   },
   h1: {
     fontSize: 32,
     fontWeight: 'bold',
   },
   h2: {
     fontSize: 24,
     fontWeight: 'bold',
   },
   h3: {
     fontSize: 18,
     fontWeight: 'bold',
   },
   h4: {
     fontSize: 16,
     fontWeight: 'bold',
   },
   h5: {
     fontSize: 13,
     fontWeight: 'bold',
   },
   h6: {
     fontSize: 11,
     fontWeight: 'bold',
   },
   blockQuote: {
     borderLeftColor: '#00000066',
     borderLeftWidth: 8,
     borderRadius: 8,
     padding: 10,
     marginBottom: 6,
     marginVertical: 6,
   },
   codeBlock: {
     backgroundColor: 'codeBackground',
     padding: 10,
     borderRadius: 5,
     marginVertical: 6,
   },
   codeBlockText: {
     fontFamily: (Platform.select({
       ios: 'Menlo',
       default: 'monospace',
     }): string),
     fontSize: (Platform.select({
       ios: 17,
       default: 18,
     }): number),
   },
   listBulletStyle: {
     fontWeight: 'bold',
   },
   listRow: {
     flexDirection: 'row',
   },
   insideListView: {
     flexShrink: 1,
   },
 };
 
 export type MarkdownStyles = typeof unboundStyles;
 
 const getMarkdownStyles: GlobalTheme => MarkdownStyles = _memoize(
   (theme: GlobalTheme) => {
     return getStylesForTheme(unboundStyles, theme);
   },
 );
 
 export { getMarkdownStyles };
diff --git a/native/themes/colors.js b/native/themes/colors.js
index 3635d314f..eac2e45a3 100644
--- a/native/themes/colors.js
+++ b/native/themes/colors.js
@@ -1,294 +1,296 @@
 // @flow
 
 import * as React from 'react';
 import { StyleSheet } from 'react-native';
 import { createSelector } from 'reselect';
 
 import { selectBackgroundIsDark } from '../navigation/nav-selectors';
 import { NavContext } from '../navigation/navigation-context';
 import { useSelector } from '../redux/redux-utils';
 import type { AppState } from '../redux/state-types';
 import type { GlobalTheme } from '../types/themes';
 
 const light = Object.freeze({
   blockQuoteBackground: '#D3D3D3',
   blockQuoteBorder: '#C0C0C0',
   codeBackground: '#DCDCDC',
   disabledButton: '#D3D3D3',
   disconnectedBarBackground: '#F5F5F5',
   editButton: '#A4A4A2',
   floatingButtonBackground: '#999999',
   floatingButtonLabel: '#EEEEEE',
   greenButton: '#6EC472',
   greenText: 'green',
   headerChevron: '#0A0A0A',
   inlineSidebarBackground: '#E0E0E0',
   inlineSidebarLabel: '#000000',
   link: '#036AFF',
   listBackground: 'white',
   listBackgroundLabel: 'black',
   listBackgroundSecondaryLabel: '#444444',
   listBackgroundTernaryLabel: '#999999',
   listChatBubble: '#F1F0F5',
   listForegroundLabel: 'black',
   listForegroundQuaternaryLabel: '#AAAAAA',
   listForegroundSecondaryLabel: '#333333',
   listForegroundTertiaryLabel: '#666666',
   listInputBackground: '#F5F5F5',
   listInputBar: '#E2E2E2',
   listInputBorder: '#AAAAAAAA',
   listInputButton: '#8E8D92',
   listIosHighlightUnderlay: '#DDDDDDDD',
   listSearchBackground: '#F5F5F5',
   listSearchIcon: '#8E8D92',
   listSeparator: '#EEEEEE',
   listSeparatorLabel: '#555555',
   markdownLink: '#000000',
   mintButton: '#44CC99',
   modalBackground: '#EEEEEE',
   modalBackgroundLabel: '#333333',
   modalBackgroundSecondaryLabel: '#AAAAAA',
   modalButton: '#BBBBBB',
   modalButtonLabel: 'black',
   modalContrastBackground: 'black',
   modalContrastForegroundLabel: 'white',
   modalContrastOpacity: 0.7,
   modalForeground: 'white',
   modalForegroundBorder: '#CCCCCC',
   modalForegroundLabel: 'black',
   modalForegroundSecondaryLabel: '#888888',
   modalForegroundTertiaryLabel: '#AAAAAA',
   modalIosHighlightUnderlay: '#CCCCCCDD',
   modalSubtext: '#CCCCCC',
   modalSubtextLabel: '#555555',
   navigationCard: '#FFFFFF',
   navigationChevron: '#BAB9BE',
   panelBackground: '#F5F5F5',
   panelBackgroundLabel: '#888888',
   panelForeground: 'white',
   panelForegroundBorder: '#CCCCCC',
   panelForegroundLabel: 'black',
   panelForegroundSecondaryLabel: '#333333',
   panelForegroundTertiaryLabel: '#888888',
   panelIosHighlightUnderlay: '#EEEEEEDD',
   panelSecondaryForeground: '#F5F5F5',
   panelSecondaryForegroundBorder: '#D1D1D6',
   redButton: '#BB8888',
   redText: '#FF4444',
+  spoiler: '#33332C',
   tabBarAccent: '#7E57C2',
   tabBarBackground: '#F5F5F5',
   tabBarActiveTintColor: '#7E57C2',
   vibrantGreenButton: '#00C853',
   vibrantRedButton: '#F53100',
   tooltipBackground: '#E0E0E0',
 });
 export type Colors = $Exact<typeof light>;
 
 const dark: Colors = Object.freeze({
   blockQuoteBackground: '#A9A9A9',
   blockQuoteBorder: '#808080',
   codeBackground: '#0A0A0A',
   disabledButton: '#444444',
   disconnectedBarBackground: '#1D1D1D',
   editButton: '#5B5B5D',
   floatingButtonBackground: '#666666',
   floatingButtonLabel: 'white',
   greenButton: '#43A047',
   greenText: '#44FF44',
   headerChevron: '#FFFFFF',
   inlineSidebarBackground: '#666666',
   inlineSidebarLabel: '#FFFFFF',
   link: '#129AFF',
   listBackground: '#0A0A0A',
   listBackgroundLabel: '#C7C7CC',
   listBackgroundSecondaryLabel: '#BBBBBB',
   listBackgroundTernaryLabel: '#888888',
   listChatBubble: '#26252A',
   listForegroundLabel: 'white',
   listForegroundQuaternaryLabel: '#555555',
   listForegroundSecondaryLabel: '#CCCCCC',
   listForegroundTertiaryLabel: '#999999',
   listInputBackground: '#1D1D1D',
   listInputBar: '#555555',
   listInputBorder: '#333333',
   listInputButton: '#AAAAAA',
   listIosHighlightUnderlay: '#BBBBBB88',
   listSearchBackground: '#1D1D1D',
   listSearchIcon: '#AAAAAA',
   listSeparator: '#3A3A3C',
   listSeparatorLabel: '#EEEEEE',
   markdownLink: '#FFFFFF',
   mintButton: '#44CC99',
   modalBackground: '#0A0A0A',
   modalBackgroundLabel: '#CCCCCC',
   modalBackgroundSecondaryLabel: '#555555',
   modalButton: '#666666',
   modalButtonLabel: 'white',
   modalContrastBackground: 'white',
   modalContrastForegroundLabel: 'black',
   modalContrastOpacity: 0.85,
   modalForeground: '#1C1C1E',
   modalForegroundBorder: '#1C1C1E',
   modalForegroundLabel: 'white',
   modalForegroundSecondaryLabel: '#AAAAAA',
   modalForegroundTertiaryLabel: '#666666',
   modalIosHighlightUnderlay: '#AAAAAA88',
   modalSubtext: '#444444',
   modalSubtextLabel: '#AAAAAA',
   navigationCard: '#2A2A2A',
   navigationChevron: '#5B5B5D',
   panelBackground: '#0A0A0A',
   panelBackgroundLabel: '#C7C7CC',
   panelForeground: '#1D1D1D',
   panelForegroundBorder: '#2C2C2E',
   panelForegroundLabel: 'white',
   panelForegroundSecondaryLabel: '#CCCCCC',
   panelForegroundTertiaryLabel: '#AAAAAA',
   panelIosHighlightUnderlay: '#313035',
   panelSecondaryForeground: '#333333',
   panelSecondaryForegroundBorder: '#666666',
   redButton: '#FF4444',
   redText: '#FF4444',
+  spoiler: '#33332C',
   tabBarAccent: '#AE94DB',
   tabBarBackground: '#0A0A0A',
   tabBarActiveTintColor: '#AE94DB',
   vibrantGreenButton: '#00C853',
   vibrantRedButton: '#F53100',
   tooltipBackground: '#1F1F1F',
 });
 const colors = { light, dark };
 
 const colorsSelector: (state: AppState) => Colors = createSelector(
   (state: AppState) => state.globalThemeInfo.activeTheme,
   (theme: ?GlobalTheme) => {
     const explicitTheme = theme ? theme : 'light';
     return colors[explicitTheme];
   },
 );
 
 const magicStrings = new Set();
 for (const theme in colors) {
   for (const magicString in colors[theme]) {
     magicStrings.add(magicString);
   }
 }
 
 type Styles = { [name: string]: { [field: string]: mixed } };
 
 type ReplaceField = (input: any) => any;
 export type StyleSheetOf<S: Styles> = $ObjMap<S, ReplaceField>;
 
 function stylesFromColors<IS: Styles>(
   obj: IS,
   themeColors: Colors,
 ): StyleSheetOf<IS> {
   const result = {};
   for (const key in obj) {
     const style = obj[key];
     const filledInStyle = { ...style };
     for (const styleKey in style) {
       const styleValue = style[styleKey];
       if (typeof styleValue !== 'string') {
         continue;
       }
       if (magicStrings.has(styleValue)) {
         const mapped = themeColors[styleValue];
         if (mapped) {
           filledInStyle[styleKey] = mapped;
         }
       }
     }
     result[key] = filledInStyle;
   }
   return StyleSheet.create(result);
 }
 
 function styleSelector<IS: Styles>(
   obj: IS,
 ): (state: AppState) => StyleSheetOf<IS> {
   return createSelector(colorsSelector, (themeColors: Colors) =>
     stylesFromColors(obj, themeColors),
   );
 }
 
 function useStyles<IS: Styles>(obj: IS): StyleSheetOf<IS> {
   const ourColors = useColors();
   return React.useMemo(() => stylesFromColors(obj, ourColors), [
     obj,
     ourColors,
   ]);
 }
 
 function useOverlayStyles<IS: Styles>(obj: IS): StyleSheetOf<IS> {
   const navContext = React.useContext(NavContext);
   const navigationState = navContext && navContext.state;
 
   const theme = useSelector(
     (state: AppState) => state.globalThemeInfo.activeTheme,
   );
 
   const backgroundIsDark = React.useMemo(
     () => selectBackgroundIsDark(navigationState, theme),
     [navigationState, theme],
   );
   const syntheticTheme = backgroundIsDark ? 'dark' : 'light';
 
   return React.useMemo(() => stylesFromColors(obj, colors[syntheticTheme]), [
     obj,
     syntheticTheme,
   ]);
 }
 
 function useColors(): Colors {
   return useSelector(colorsSelector);
 }
 
 function getStylesForTheme<IS: Styles>(
   obj: IS,
   theme: GlobalTheme,
 ): StyleSheetOf<IS> {
   return stylesFromColors(obj, colors[theme]);
 }
 
 export type IndicatorStyle = 'white' | 'black';
 function useIndicatorStyle(): IndicatorStyle {
   const theme = useSelector(
     (state: AppState) => state.globalThemeInfo.activeTheme,
   );
   return theme && theme === 'dark' ? 'white' : 'black';
 }
 const indicatorStyleSelector: (
   state: AppState,
 ) => IndicatorStyle = createSelector(
   (state: AppState) => state.globalThemeInfo.activeTheme,
   (theme: ?GlobalTheme) => {
     return theme && theme === 'dark' ? 'white' : 'black';
   },
 );
 
 export type KeyboardAppearance = 'default' | 'light' | 'dark';
 const keyboardAppearanceSelector: (
   state: AppState,
 ) => KeyboardAppearance = createSelector(
   (state: AppState) => state.globalThemeInfo.activeTheme,
   (theme: ?GlobalTheme) => {
     return theme && theme === 'dark' ? 'dark' : 'light';
   },
 );
 
 function useKeyboardAppearance(): KeyboardAppearance {
   return useSelector(keyboardAppearanceSelector);
 }
 
 export {
   colors,
   colorsSelector,
   styleSelector,
   useStyles,
   useOverlayStyles,
   useColors,
   getStylesForTheme,
   useIndicatorStyle,
   indicatorStyleSelector,
   useKeyboardAppearance,
 };