Remove stale options (should prefer using custom and SpecificBackgroundColorBehavior)
SpecificBackgroundColorBehavior is simpler and clearer, so the use-case for Contrast* is greatly diminished.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
SpecificBackgroundColorBehavior is simpler and clearer, so the use-case for Contrast* is greatly diminished.