I also agree that the colors still need improvement. Especially in contrast reduction.

Right nor the best segment contrast-wise is the header and the buttons on the header. But the whole group is way too bright compared to the rest of the page.

Another good match is right here in the forum: the post body/comment background and the overal page background (3 simlar but yet distinctly different shades of gray). Again this group works well by itself, but it is too contrasting with the site header.