Fixed snackbar background color

FAQ.md

@@ -32,7 +32,6 @@ Anything on this list is in random order and *might* be added in the near future
 ## Known problems
 
 * File not selected (canceled) when using a file manager instead of the [Storage Access Framework](https://developer.android.com/guide/topics/providers/document-provider). This cannot be fixed by FairEmail, but you can workaround this problem by selecting *Always*.
-* Black snackbar background color in black theme. Unfortunately, the snackbar cannot be styled.
 
 
 ## Frequently requested features

app/src/main/res/values/colors.xml

@@ -31,7 +31,7 @@
     <color name="darkColorDrawerBackground">#222</color>
 
     <!-- default: #323232 -->
-    <color name="design_snackbar_background_color" tools:override="true">#ff000000</color>
+    <color name="design_snackbar_background_color" tools:override="true">#222</color>
 
     <!-- color picker -->
     <color name="red">#F6402C</color>