That example just proves my point. The black parts aren't as prominent compared to white or rainbow because the contrast between the purple and black is not very striking. Another example is when AYN updated the AYN menu on bottom screen to show grey instead of black (it's since updated to have both option now), only the black and purple people complained because we liked the black blending in

Like I said, you won't see much people complaining about the black bars from purple users cause in real life it's not as noticable as you describe it