Does everybody like pure black background gallery?)
I prefer the old grey gallery look, but they had some good reason to switch to browser gallery and unfortunately they can't change anything there except for dark or light theme. And I think mixing light and dark theme like you suggested would clash even more
I like grey too, it’s calm for eyes. White on Pure Black is too harsh and overwhelming. Now, I realized one thing: I’m almost don’t need gallery now. You can open .artstudio files from Files app, which has normal white theme. And it can normally preview all other image file types.
And speaking of color accents to the app, I guess they are too saturated, that’s why people want to add there own colors. But color wheel of course would be good. I’m fine with standard orange myself.