Edit:
Now that I look closer I guess the posts are more of a very very light gray as opposed to white.
I think that gray color could do to be a little bit darker and then things would probably be ideal.

Or maybe the top part and bottom part of the board where it has the "this day in history" and the "general board" etc parts could be a different color instead of white. Then you could leave this light shade of gray but it wouldn't seem so bright because it would be surrounded by a darker color.