I dunno if this is the default colour scheme. It works. I come here for the critique and the pixel discussion, not because of the colours, and pixelopolis still delivers in my opinion (I do not say this because I am a moderator, people who know me know that I don't mince my words) and that's what's important.
I'm certain though, that when it becomes a priority, the skinning of the forum will be worked on.