When I saw the “Top bar color chooser” power-up, I immediately hoped I could bring some color into StackOverflow and make the top bar pink or rainbow-colored. So I spent a significant part of my day hurting my mouse by farming those 80 unicoins.
But then I was presented by this super disappointing selection of possible colors.
I believe those colors are super boring and far too dark. It feels like the StackExchange team is against happyness. So I would suggest adding a few more color schemes to it. Because just look at this fancyness: