diff --git a/web/sidebar/expand-buttons.css b/web/sidebar/expand-buttons.css
new file mode 100644
index 000000000..42602831a
--- /dev/null
+++ b/web/sidebar/expand-buttons.css
@@ -0,0 +1,13 @@
+.buttonIcon {
+  color: var(--drawer-expand-button);
+}
+
+.disabledButtonIcon {
+  color: var(--drawer-expand-button-disabled);
+}
+
+.button {
+  font-size: var(--xs-font-12);
+  width: 24px;
+  height: 24px;
+}
diff --git a/web/sidebar/expand-buttons.react.js b/web/sidebar/expand-buttons.react.js
new file mode 100644
index 000000000..8fd70a903
--- /dev/null
+++ b/web/sidebar/expand-buttons.react.js
@@ -0,0 +1,33 @@
+// @flow
+
+import { faCaretDown, faCaretRight } from '@fortawesome/free-solid-svg-icons';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import classNames from 'classnames';
+import * as React from 'react';
+
+import css from './expand-buttons.css';
+import Button from '../components/button.react.js';
+
+type Props = {
+  +onClick?: () => mixed,
+  +expanded?: boolean,
+  +disabled?: boolean,
+};
+
+function ExpandButton(props: Props): React.Node {
+  const { onClick, expanded = false, disabled } = props;
+  const icon = expanded ? faCaretDown : faCaretRight;
+
+  const iconClass = classNames({
+    [css.disabledButtonIcon]: disabled,
+    [css.buttonIcon]: !disabled,
+  });
+
+  return (
+    <Button onClick={onClick} className={css.button} disabled={disabled}>
+      <FontAwesomeIcon icon={icon} className={iconClass} />
+    </Button>
+  );
+}
+
+export { ExpandButton };
diff --git a/web/theme.css b/web/theme.css
index f340920df..db2510b75 100644
--- a/web/theme.css
+++ b/web/theme.css
@@ -1,197 +1,199 @@
 :root {
   /* Never use color values defined here directly in CSS. Add color variables to "Color Theme" below
 
      The reason we never use color values defined here directly in CSS is
 
       1. It makes changing themes from light / dark / user generated impossible.
       2. Gives the programmer context into the color being used.
       3. If our color system changes it's much easier to change color values in one place.
 
      Add a color value to the theme below, and then use it in your CSS.
      naming convention:
      - bg: background.
      - fg: foreground.
      - color: text-color
    */
   --shades-white-100: #ffffff;
   --shades-white-90: #f5f5f5;
   --shades-white-80: #ebebeb;
   --shades-white-70: #e0e0e0;
   --shades-white-60: #cccccc;
 
   --shades-black-100: #0a0a0a;
   --shades-black-90: #1f1f1f;
   --shades-black-80: #404040;
   --shades-black-70: #666666;
   --shades-black-60: #808080;
 
   --violet-dark-100: #7e57c2;
   --violet-dark-80: #6d49ab;
   --violet-dark-60: #563894;
   --violet-dark-40: #44297a;
   --violet-dark-20: #331f5c;
 
   --violet-light-100: #ae94db;
   --violet-light-80: #b9a4df;
   --violet-light-60: #d3c6ec;
   --violet-light-40: #e8e0f5;
   --violet-light-20: #f3f0fa;
 
   --success-light-10: #d5f6e3;
   --success-light-50: #6cdf9c;
   --success-primary: #00c853;
   --success-dark-50: #029841;
   --success-dark-90: #034920;
 
   --error-light-10: #feebe6;
   --error-light-50: #f9947b;
   --error-primary: #f53100;
   --error-dark-50: #b62602;
   --error-dark-90: #4f1203;
 
   --logo-bg: #111827;
   --spoiler-color: #33332c;
   --loading-foreground: #1b0e38;
 
   --bg: var(--shades-black-100);
   --fg: var(--shades-white-100);
   --color-disabled: var(--shades-black-60);
   --text-input-bg: var(--shades-black-80);
   --text-input-color: var(--shades-white-60);
   --text-input-placeholder: var(--shades-white-60);
   --border: var(--shades-black-80);
   --error: var(--error-primary);
   --success: var(--success-dark-50);
 
   /* Color Theme */
 
   --btn-bg-filled: var(--violet-dark-100);
   --btn-bg-outline: var(--shades-black-90);
   --btn-bg-success: var(--success-dark-50);
   --btn-bg-danger: var(--error-primary);
   --btn-bg-disabled: var(--shades-black-80);
   --btn-disabled-color: var(--shades-black-60);
   --chat-bg: var(--violet-dark-80);
   --chat-confirmation-icon: var(--violet-dark-100);
   --keyserver-selection: var(--violet-dark-60);
   --thread-selection: var(--violet-light-80);
   --thread-hover-bg: var(--shades-black-80);
   --thread-active-bg: var(--shades-black-80);
   --chat-timestamp-color: var(--shades-black-60);
   --tool-tip-bg: var(--shades-black-80);
   --tool-tip-color: var(--shades-white-60);
   --border-color: var(--shades-black-80);
   --calendar-chevron: var(--shades-black-60);
   --calendar-day-bg: var(--shades-black-60);
   --calendar-day-selected-color: var(--violet-dark-80);
   --community-bg: var(--shades-black-90);
   --community-settings-selected: var(--violet-dark-60);
   --unread-bg: var(--error-primary);
   --settings-btn-bg: var(--violet-dark-100);
   --modal-bg: var(--shades-black-90);
   --modal-fg: var(--shades-white-60);
   --join-bg: var(--shades-black-90);
   --help-color: var(--shades-black-60);
   --breadcrumb-color: var(--shades-white-60);
   --breadcrumb-color-unread: var(--shades-white-60);
   --btn-outline-border: var(--shades-black-60);
   --thread-color-read: var(--shades-black-60);
   --thread-preview-secondary: var(--shades-black-70);
   --relationship-button-green: var(--success-dark-50);
   --relationship-button-red: var(--error-primary);
   --relationship-button-text: var(--fg);
   --disconnected-bar-alert-bg: var(--error-dark-50);
   --disconnected-bar-alert-color: var(--shades-white-100);
   --disconnected-bar-connecting-bg: var(--shades-white-70);
   --disconnected-bar-connecting-color: var(--shades-black-100);
   --permission-color: var(--shades-white-60);
   --thread-top-bar-color: var(--shades-white-100);
   --thread-top-bar-menu-color: var(--shades-white-70);
   --thread-ancestor-keyserver-border: var(--shades-black-70);
   --thread-ancestor-color-light: var(--shades-white-70);
   --thread-ancestor-color-dark: var(--shades-black-100);
   --thread-ancestor-separator-color: var(--shades-white-60);
   --text-message-default-background: var(--shades-black-80);
   --message-action-tooltip-bg: var(--shades-black-90);
   --message-action-tooltip-bg-light: var(--shades-black-80);
   --menu-bg: var(--shades-black-90);
   --menu-bg-light: var(--shades-black-80);
   --menu-separator-color: var(--shades-black-80);
   --menu-color: var(--shades-black-60);
   --menu-color-light: var(--shades-white-60);
   --menu-color-hover: var(--shades-white-100);
   --menu-color-dangerous: var(--error-primary);
   --menu-color-dangerous-hover: var(--error-light-50);
   --app-list-icon-read-only-color: var(--shades-black-60);
   --app-list-icon-enabled-color: var(--success-primary);
   --app-list-icon-disabled-color: var(--shades-white-80);
   --account-settings-label: var(--shades-black-60);
   --account-button-color: var(--violet-dark-100);
   --chat-thread-list-color-active: var(--shades-white-60);
   --chat-thread-list-menu-color: var(--shades-white-60);
   --chat-thread-list-menu-bg: var(--shades-black-80);
   --chat-thread-list-menu-active-color: var(--shades-white-60);
   --chat-thread-list-menu-active-bg: var(--shades-black-90);
   --search-clear-color: var(--shades-white-100);
   --search-clear-bg: var(--shades-black-70);
   --search-input-color: var(--shades-white-100);
   --search-input-placeholder: var(--shades-black-60);
   --search-icon-color: var(--shades-black-60);
   --tabs-header-active-color: var(--shades-white-100);
   --tabs-header-active-border: var(--violet-light-100);
   --tabs-header-background-color: var(--shades-black-60);
   --tabs-header-background-border: var(--shades-black-80);
   --tabs-header-background-color-hover: var(--shades-white-80);
   --tabs-header-background-border-hover: var(--shades-black-70);
   --members-modal-member-text: var(--shades-black-60);
   --members-modal-member-text-hover: var(--shades-white-100);
   --label-default-bg: var(--violet-dark-80);
   --label-default-color: var(--shades-white-80);
   --subchannels-modal-color: var(--shades-black-60);
   --subchannels-modal-color-hover: var(--shades-white-100);
   --color-selector-active-bg: var(--shades-black-80);
   --relationship-modal-color: var(--shades-black-60);
   --arrow-extension-color: var(--shades-black-60);
   --modal-close-color: var(--shades-black-60);
   --modal-close-color-hover: var(--shades-white-100);
   --add-members-group-header-color: var(--shades-black-60);
   --add-members-item-color: var(--shades-black-60);
   --add-members-item-color-hover: var(--shades-white-100);
   --add-members-item-disabled-color: var(--shades-black-80);
   --add-members-item-disabled-color-hover: var(--shades-black-60);
   --add-members-remove-pending-color: var(--error-primary);
   --add-members-remove-pending-color-hover: var(--error-light-50);
   --radio-border: var(--shades-black-70);
   --radio-color: var(--shades-white-60);
   --notification-settings-option-selected-bg: var(--shades-black-80);
   --notification-settings-option-title-color: var(--shades-white-90);
   --notification-settings-option-color: var(--shades-white-60);
   --notification-settings-option-invalid-color: var(--shades-black-80);
   --notification-settings-option-invalid-selected-color: var(--shades-black-60);
   --danger-zone-subheading-color: var(--shades-white-60);
   --danger-zone-explanation-color: var(--shades-black-60);
   --thread-creation-search-container-bg: var(--shades-black-90);
   --thread-creation-close-search-color: var(--shades-black-60);
   --thread-creation-search-item-bg-hover: var(--shades-black-80);
   --thread-creation-search-item-info-color: var(--shades-black-60);
   --chat-message-list-active-border: #5989d6;
   --sidebars-modal-color: var(--shades-black-60);
   --sidebars-modal-color-hover: var(--shades-white-100);
   --inline-engagement-bg: var(--shades-black-70);
   --inline-engagement-bg-hover: var(--shades-black-80);
   --inline-engagement-color: var(--fg);
   --compose-subchannel-header-fg: var(--shades-black-60);
   --compose-subchannel-header-bg: var(--shades-black-80);
   --compose-subchannel-label-color: var(--shades-black-60);
   --compose-subchannel-mark-color: var(--violet-light-100);
   --enum-option-icon-color: var(--violet-dark-100);
   --show-password-bg-hover: var(--shades-black-70);
   --typeahead-overlay-light: var(--shades-black-80);
   --typeahead-overlay-dark: var(--shades-black-90);
   --typeahead-overlay-text: var(--shades-white-100);
   --typeahead-overlay-shadow-primary: rgba(0, 0, 0, 0.25);
   --typeahead-overlay-shadow-secondary: rgba(0, 0, 0, 0.4);
   --spoiler-text-color: var(--spoiler-color);
   --spoiler-background-color: var(--spoiler-color);
   --purple-link: var(--violet-light-100);
+  --drawer-expand-button: var(--shades-black-60);
+  --drawer-expand-button-disabled: var(--shades-black-80);
 }