message: also theme values close to custom palette variables
  these values are not exactly the same as the palette values,
  so we're essentially flattening the color palette used in the
  theme, but this is needed when assigning custom colors for it
  to look good.
diff: @@ -49,12 +49,26 @@ $widget-menu-bar-bg-color: var(--panel-color);
  // PALETTE COLOR: panel contrast color
  $input-darker-bg-color: var(--panel-contrast-color);
  $panel-divider-color: var(--panel-contrast-color);// originally #dee1f3, not #e3e8f0, but close enough
  +$primary-hairline-color: var(--panel-contrast-color);// originally #e5e5e5, not #e3e8f0, but close enough
  //
  // PALETTE COLOR: body text color
  $message-action-bar-fg-color: var(--body-text-color);
  $primary-fg-color: var(--body-text-color);
  $settings-profile-overlay-placeholder-fg-color: var(--body-text-color);
  $dialog-backdrop-color: var(--body-text-color-50pct); //still needs alpha at .38
  +$roomtopic-color: var(--body-text-color-50pct); //still needs alpha at .5
  +$tab-label-fg-color: var(--body-text-color);
  +$tab-label-icon-bg-color: var(--body-text-color); //was #454545
  +// was #212121
  +$roomtile-notified-color: var(--body-text-color);
  +$roomtile-selected-color: var(--body-text-color);
  +$topleftmenu-color: var(--body-text-color);
  +// was #45474a
  +$dialog-title-fg-color: var(--body-text-color);
  +$roomheader-color: var(--body-text-color);
  +$tab-label-fg-color: var(--body-text-color);
  +// was #4e5054
  +$authpage-lang-color: var(--body-text-color);
  //
  // PALETTE COLOR: body contrast color
  $authpage-secondary-color: var(--body-contrast-color);
  @@ -64,6 +78,15 @@ $pinned-color: var(--body-contrast-color);
  $roomsublist-label-fg-color: var(--body-contrast-color);
  $roomtile-name-color: var(--body-contrast-color);
  $settings-subsection-fg-color: var(--body-contrast-color);
  +$roomheader-addroom-bg-color: var(--body-contrast-color);
  +// was #747474
  +$light-fg-color: var(--body-contrast-color);
  +// was #777777
  +$blockquote-fg-color: var(--body-contrast-color);
  +// was #888888
  +$greyed-fg-color: var(--body-contrast-color);
  +$info-plinth-fg-color: var(--body-contrast-color);
  +$preview-widget-fg-color: var(--body-contrast-color);
  //
  // PALETTE COLOR: primary color
  $accent-color-alt: var(--primary-color);
  @@ -77,5 +100,4 @@ $mention-user-pill-bg-color: var(--warning-color);
  $notice-primary-color: var(--warning-color);
  $pinned-unread-color: var(--warning-color);
  $warning-color: var(--warning-color);
  -
  $button-danger-disabled-bg-color: var(--warning-color-50pct); // still needs alpha at 0.5
  