diff --git a/native/account/registration/keyserver-selection.react.js b/native/account/registration/keyserver-selection.react.js
index ef038048f..984154bde 100644
--- a/native/account/registration/keyserver-selection.react.js
+++ b/native/account/registration/keyserver-selection.react.js
@@ -1,139 +1,146 @@
 // @flow
 
 import * as React from 'react';
 import { Text, TextInput, View } from 'react-native';
 
 import RegistrationButton from './registration-button.react.js';
 import RegistrationContainer from './registration-container.react.js';
 import type { RegistrationNavigationProp } from './registration-navigator.react.js';
 import {
   RegistrationTile,
   RegistrationTileHeader,
 } from './registration-tile.react.js';
 import CommIcon from '../../components/comm-icon.react.js';
 import type { NavigationRoute } from '../../navigation/route-names.js';
 import { useStyles, useColors } from '../../themes/colors.js';
 
 type Selection = 'ashoat' | 'custom';
 
 type Props = {
   +navigation: RegistrationNavigationProp<'KeyserverSelection'>,
   +route: NavigationRoute<'KeyserverSelection'>,
 };
 // eslint-disable-next-line no-unused-vars
 function KeyserverSelection(props: Props): React.Node {
   const [customKeyserver, setCustomKeyserver] = React.useState('');
   const customKeyserverTextInputRef = React.useRef();
 
   const [currentSelection, setCurrentSelection] = React.useState<?Selection>();
   const selectAshoat = React.useCallback(() => {
     setCurrentSelection('ashoat');
     customKeyserverTextInputRef.current?.blur();
   }, []);
   const customKeyserverEmpty = !customKeyserver;
   const selectCustom = React.useCallback(() => {
     setCurrentSelection('custom');
     if (customKeyserverEmpty) {
       customKeyserverTextInputRef.current?.focus();
     }
   }, [customKeyserverEmpty]);
   const onCustomKeyserverFocus = React.useCallback(() => {
     setCurrentSelection('custom');
   }, []);
 
+  let buttonState = 'disabled';
+  if (
+    currentSelection === 'ashoat' ||
+    (currentSelection === 'custom' && customKeyserver)
+  ) {
+    buttonState = 'enabled';
+  }
   const onSubmit = React.useCallback(() => {}, []);
 
   const styles = useStyles(unboundStyles);
   const colors = useColors();
   return (
     <View style={styles.container}>
       <RegistrationContainer>
         <Text style={styles.header}>Select a keyserver to join</Text>
         <Text style={styles.body}>
           Chat communities on Comm are hosted on keyservers, which are
           user-operated backends.
         </Text>
         <Text style={styles.body}>
           Keyservers allow Comm to offer strong privacy guarantees without
           sacrificing functionality.
         </Text>
         <RegistrationTile
           selected={currentSelection === 'ashoat'}
           onSelect={selectAshoat}
         >
           <RegistrationTileHeader>
             <CommIcon
               name="cloud-filled"
               size={16}
               color={colors.panelForegroundLabel}
               style={styles.cloud}
             />
             <Text style={styles.tileTitleText}>ashoat</Text>
           </RegistrationTileHeader>
           <Text style={styles.tileBody}>
             Ashoat is Comm’s founder, and his keyserver currently hosts most of
             the communities on Comm.
           </Text>
         </RegistrationTile>
         <RegistrationTile
           selected={currentSelection === 'custom'}
           onSelect={selectCustom}
         >
           <RegistrationTileHeader>
             <Text style={styles.tileTitleText}>Enter a keyserver</Text>
           </RegistrationTileHeader>
           <TextInput
             value={customKeyserver}
             onChangeText={setCustomKeyserver}
             style={styles.keyserverInput}
             placeholderTextColor={colors.panelSecondaryForegroundBorder}
             placeholder="Keyserver"
             onFocus={onCustomKeyserverFocus}
             ref={customKeyserverTextInputRef}
           />
         </RegistrationTile>
       </RegistrationContainer>
-      <RegistrationButton onPress={onSubmit} label="Next" />
+      <RegistrationButton onPress={onSubmit} label="Next" state={buttonState} />
     </View>
   );
 }
 
 const unboundStyles = {
   container: {
     backgroundColor: 'panelBackground',
     justifyContent: 'space-between',
     flex: 1,
   },
   header: {
     fontSize: 24,
     color: 'panelForegroundLabel',
     paddingBottom: 16,
   },
   body: {
     fontSize: 15,
     lineHeight: 20,
     color: 'panelForegroundSecondaryLabel',
     paddingBottom: 16,
   },
   tileTitleText: {
     flex: 1,
     fontSize: 18,
     color: 'panelForegroundLabel',
   },
   tileBody: {
     fontSize: 13,
     color: 'panelForegroundSecondaryLabel',
   },
   cloud: {
     marginRight: 8,
   },
   keyserverInput: {
     color: 'panelForegroundLabel',
     borderColor: 'panelSecondaryForegroundBorder',
     borderWidth: 1,
     borderRadius: 4,
     padding: 12,
   },
 };
 
 export default KeyserverSelection;
diff --git a/native/account/registration/registration-button.react.js b/native/account/registration/registration-button.react.js
index ec67ca0f9..fe44581a4 100644
--- a/native/account/registration/registration-button.react.js
+++ b/native/account/registration/registration-button.react.js
@@ -1,37 +1,64 @@
 // @flow
 
 import * as React from 'react';
 import { Text } from 'react-native';
 
 import Button from '../../components/button.react.js';
 import { useStyles } from '../../themes/colors.js';
 
 type Props = {
   +onPress: () => mixed,
   +label: string,
+  +state?: 'enabled' | 'disabled' | 'loading',
 };
 function RegistrationButton(props: Props): React.Node {
-  const { onPress, label } = props;
+  const { onPress, label, state } = props;
+
   const styles = useStyles(unboundStyles);
+  const buttonStyle = React.useMemo(() => {
+    if (state === 'disabled' || state === 'loading') {
+      return [styles.button, styles.disabledButton];
+    } else {
+      return styles.button;
+    }
+  }, [state, styles.button, styles.disabledButton]);
+  const buttonTextStyle = React.useMemo(() => {
+    if (state === 'disabled') {
+      return [styles.buttonText, styles.disabledButtonText];
+    }
+    return styles.buttonText;
+  }, [state, styles.buttonText, styles.disabledButtonText]);
+
   return (
-    <Button onPress={onPress} iosActiveOpacity={0.6} style={styles.button}>
-      <Text style={styles.buttonText}>{label}</Text>
+    <Button
+      onPress={onPress}
+      iosActiveOpacity={0.6}
+      style={buttonStyle}
+      disabled={state === 'disabled' || state === 'loading'}
+    >
+      <Text style={buttonTextStyle}>{label}</Text>
     </Button>
   );
 }
 
 const unboundStyles = {
   button: {
     backgroundColor: 'purpleButton',
     borderRadius: 8,
     margin: 16,
   },
   buttonText: {
     fontSize: 18,
     color: 'panelForegroundLabel',
     textAlign: 'center',
     padding: 12,
   },
+  disabledButton: {
+    backgroundColor: 'disabledButton',
+  },
+  disabledButtonText: {
+    color: 'disabledButtonText',
+  },
 };
 
 export default RegistrationButton;
diff --git a/native/themes/colors.js b/native/themes/colors.js
index 6f3f867fa..8600c1967 100644
--- a/native/themes/colors.js
+++ b/native/themes/colors.js
@@ -1,321 +1,323 @@
 // @flow
 
 import * as React from 'react';
 import { StyleSheet } from 'react-native';
 import { createSelector } from 'reselect';
 
 import { selectBackgroundIsDark } from '../navigation/nav-selectors.js';
 import { NavContext } from '../navigation/navigation-context.js';
 import { useSelector } from '../redux/redux-utils.js';
 import type { AppState } from '../redux/state-types.js';
 import type { GlobalTheme } from '../types/themes.js';
 
 const light = Object.freeze({
   blockQuoteBackground: '#E0E0E0',
   blockQuoteBorder: '#CCCCCC',
   codeBackground: '#E0E0E0',
   disabledButton: '#E0E0E0',
+  disabledButtonText: '#808080',
   disconnectedBarBackground: '#F5F5F5',
   editButton: '#A4A4A2',
   floatingButtonBackground: '#999999',
   floatingButtonLabel: '#EBEBEB',
   headerChevron: '#0A0A0A',
   inlineEngagementBackground: '#E0E0E0',
   inlineEngagementLabel: '#0A0A0A',
   link: '#7E57C2',
   listBackground: '#FFFFFF',
   listBackgroundLabel: '#0A0A0A',
   listBackgroundSecondaryLabel: '#444444',
   listBackgroundTernaryLabel: '#999999',
   listChatBubble: '#F1F0F5',
   listForegroundLabel: '#0A0A0A',
   listForegroundSecondaryLabel: '#333333',
   listForegroundTertiaryLabel: '#666666',
   listInputBackground: '#F5F5F5',
   listInputBar: '#E2E2E2',
   listInputButton: '#8E8D92',
   listIosHighlightUnderlay: '#DDDDDDDD',
   listSearchBackground: '#F5F5F5',
   listSearchIcon: '#8E8D92',
   listSeparatorLabel: '#666666',
   modalBackground: '#EBEBEB',
   modalBackgroundLabel: '#333333',
   modalBackgroundSecondaryLabel: '#AAAAAA',
   modalButton: '#BBBBBB',
   modalButtonLabel: '#0A0A0A',
   modalContrastBackground: '#0A0A0A',
   modalContrastForegroundLabel: '#FFFFFF',
   modalContrastOpacity: 0.7,
   modalForeground: '#FFFFFF',
   modalForegroundBorder: '#CCCCCC',
   modalForegroundLabel: '#0A0A0A',
   modalForegroundSecondaryLabel: '#888888',
   modalForegroundTertiaryLabel: '#AAAAAA',
   modalIosHighlightUnderlay: '#CCCCCCDD',
   modalSubtext: '#CCCCCC',
   modalSubtextLabel: '#666666',
   navigationCard: '#FFFFFF',
   navigationChevron: '#CCCCCC',
   panelBackground: '#F5F5F5',
   panelBackgroundLabel: '#888888',
   panelForeground: '#FFFFFF',
   panelForegroundBorder: '#CCCCCC',
   panelForegroundLabel: '#0A0A0A',
   panelForegroundSecondaryLabel: '#333333',
   panelForegroundTertiaryLabel: '#888888',
   panelIosHighlightUnderlay: '#EBEBEBDD',
   panelSecondaryForeground: '#F5F5F5',
   panelSecondaryForegroundBorder: '#CCCCCC',
   purpleLink: '#7E57C2',
   purpleButton: '#7E57C2',
   reactionSelectionPopoverItemBackground: '#404040',
   redText: '#F53100',
   spoiler: '#33332C',
   tabBarAccent: '#7E57C2',
   tabBarBackground: '#F5F5F5',
   tabBarActiveTintColor: '#7E57C2',
   vibrantGreenButton: '#00C853',
   vibrantRedButton: '#F53100',
   whiteText: '#FFFFFF',
   tooltipBackground: '#E0E0E0',
   logInSpacer: '#FFFFFF33',
   siweButton: '#FFFFFF',
   siweButtonText: '#1F1F1F',
   drawerExpandButton: '#808080',
   drawerExpandButtonDisabled: '#CCCCCC',
   drawerItemLabelLevel0: '#0A0A0A',
   drawerItemLabelLevel1: '#0A0A0A',
   drawerItemLabelLevel2: '#1F1F1F',
   drawerOpenCommunityBackground: '#F5F5F5',
   drawerBackground: '#FFFFFF',
   subthreadsModalClose: '#808080',
   subthreadsModalBackground: '#EBEBEB',
   subthreadsModalSearch: '#00000008',
   messageLabel: '#0A0A0A',
   modalSeparator: '#CCCCCC',
   secondaryButtonBorder: '#FFFFFF',
 });
 export type Colors = $Exact<typeof light>;
 
 const dark: Colors = Object.freeze({
   blockQuoteBackground: '#A9A9A9',
   blockQuoteBorder: '#808080',
   codeBackground: '#0A0A0A',
   disabledButton: '#404040',
+  disabledButtonText: '#808080',
   disconnectedBarBackground: '#1F1F1F',
   editButton: '#666666',
   floatingButtonBackground: '#666666',
   floatingButtonLabel: '#FFFFFF',
   headerChevron: '#FFFFFF',
   inlineEngagementBackground: '#666666',
   inlineEngagementLabel: '#FFFFFF',
   link: '#AE94DB',
   listBackground: '#0A0A0A',
   listBackgroundLabel: '#CCCCCC',
   listBackgroundSecondaryLabel: '#BBBBBB',
   listBackgroundTernaryLabel: '#808080',
   listChatBubble: '#26252A',
   listForegroundLabel: '#FFFFFF',
   listForegroundSecondaryLabel: '#CCCCCC',
   listForegroundTertiaryLabel: '#808080',
   listInputBackground: '#1F1F1F',
   listInputBar: '#666666',
   listInputButton: '#CCCCCC',
   listIosHighlightUnderlay: '#BBBBBB88',
   listSearchBackground: '#1F1F1F',
   listSearchIcon: '#CCCCCC',
   listSeparatorLabel: '#EBEBEB',
   modalBackground: '#0A0A0A',
   modalBackgroundLabel: '#CCCCCC',
   modalBackgroundSecondaryLabel: '#666666',
   modalButton: '#666666',
   modalButtonLabel: '#FFFFFF',
   modalContrastBackground: '#FFFFFF',
   modalContrastForegroundLabel: '#0A0A0A',
   modalContrastOpacity: 0.85,
   modalForeground: '#1F1F1F',
   modalForegroundBorder: '#1F1F1F',
   modalForegroundLabel: '#FFFFFF',
   modalForegroundSecondaryLabel: '#AAAAAA',
   modalForegroundTertiaryLabel: '#666666',
   modalIosHighlightUnderlay: '#AAAAAA88',
   modalSubtext: '#404040',
   modalSubtextLabel: '#AAAAAA',
   navigationCard: '#2A2A2A',
   navigationChevron: '#666666',
   panelBackground: '#0A0A0A',
   panelBackgroundLabel: '#CCCCCC',
   panelForeground: '#1F1F1F',
   panelForegroundBorder: '#2C2C2E',
   panelForegroundLabel: '#FFFFFF',
   panelForegroundSecondaryLabel: '#CCCCCC',
   panelForegroundTertiaryLabel: '#AAAAAA',
   panelIosHighlightUnderlay: '#313035',
   panelSecondaryForeground: '#333333',
   panelSecondaryForegroundBorder: '#666666',
   purpleLink: '#AE94DB',
   purpleButton: '#7E57C2',
   reactionSelectionPopoverItemBackground: '#404040',
   redText: '#F53100',
   spoiler: '#33332C',
   tabBarAccent: '#AE94DB',
   tabBarBackground: '#0A0A0A',
   tabBarActiveTintColor: '#AE94DB',
   vibrantGreenButton: '#00C853',
   vibrantRedButton: '#F53100',
   whiteText: '#FFFFFF',
   tooltipBackground: '#1F1F1F',
   logInSpacer: '#FFFFFF33',
   siweButton: '#FFFFFF',
   siweButtonText: '#1F1F1F',
   drawerExpandButton: '#808080',
   drawerExpandButtonDisabled: '#404040',
   drawerItemLabelLevel0: '#CCCCCC',
   drawerItemLabelLevel1: '#CCCCCC',
   drawerItemLabelLevel2: '#F5F5F5',
   drawerOpenCommunityBackground: '#191919',
   drawerBackground: '#1F1F1F',
   subthreadsModalClose: '#808080',
   subthreadsModalBackground: '#1F1F1F',
   subthreadsModalSearch: '#FFFFFF04',
   typeaheadTooltipBackground: '#1F1F1f',
   typeaheadTooltipBorder: '#404040',
   typeaheadTooltipText: 'white',
   messageLabel: '#CCCCCC',
   modalSeparator: '#404040',
   secondaryButtonBorder: '#FFFFFF',
 });
 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,
 };