Q: I don't like most in www.grothendieck-circle.org is its design (the content is excellent).
I don't like especially its color scheme, used also by default on this forum.
A: I think that the keepers (Leila Schneps) of grothendieck-circle.org would appreciate
any technical help and advice; in any case, she's a mathematician, not a web-designer.
The design of grothendieck-circle.org is quite old, actually. And she is perhaps quite busy, too.