Use accent color for "floating action button" (mobile compose button).

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 ### Fixed
+- Layout: use accent color for "floating action button" (mobile compose button).
 
 ## [3.0.0] - 2022-12-25
 

app/soapbox/features/ui/components/floating-action-button.tsx

@@ -27,7 +27,7 @@ const FloatingActionButton: React.FC<IFloatingActionButton> = () => {
       onClick={handleOpenComposeModal}
       className={clsx(
         'p-4 inline-flex items-center border font-medium rounded-full focus:outline-none focus:ring-2 focus:ring-offset-2 appearance-none transition-all',
-        'bg-primary-500 hover:bg-primary-400 dark:hover:bg-primary-600 border-transparent focus:bg-primary-500 text-gray-100 focus:ring-primary-300',
+        'border-transparent bg-secondary-500 hover:bg-secondary-400 focus:bg-secondary-500 text-gray-100 focus:ring-secondary-300',
       )}
       aria-label={intl.formatMessage(messages.publish)}
     >