I'm in.
The new look is mostly nice! Very weird change. I feel that they should just return the functionality they've taken away (come on, search bar! also other stuff) and maybe make the logo become colorful when hovered by the mouse so at least we can recognize the brand we have known.
Also, in game pages: maybe the moving of information (genre, developer) from the header to the sidebar is less user friendly. And they don't feature the box art (hum, installer… packaging… art?) in game pages anymore! Also that little ticker that told you how long the download was going to take.
As long as they make it as functional and friendly as before, I'm sure color is minor. Also: GOG was already gray before, in most places it is now! They just had gradients instead of stark colors. That's more likely the problem we have here.
Thanks for the giveaway to everyone involved!