I’ve got a (black) pair and really like them. I’m not sure what the comment below is talking about but I haven’t installed any Anker apps and they work just fine for plug and play use.
I can’t imagine someone whose deal breaking criteria is the color would care about audiophile-level controls on a pair of BT headphones.
You don’t need an sdk to set up flathub.
I don’t use Ubuntu but reviewing the commands on the flatpak website they seem pretty straightforward.
https://flatpak.org/setup/Ubuntu
From there you should be able to install Kega from the Kega listing by clicking the install button.
https://flathub.org/apps/com.carpeludum.KegaFusion