I thought that classic gray was an amazing color for PS4 but it just doesn't suit the PS5 at all. I do think a dark gray would be excellent. So would a very dark blue.
These colors all go from meh to suck. It's good that black is there as a de facto solution to "normalize" the garish router and make the black inside less distinct, but now that there are other colors too, I'd want a color better than black, just not any of these though lol.
The blue is okay for a few seconds. The purple is good because it's dark but idk I'm not the Joker lol.