Yeah, like Klyde & VM11 said.
Try to avoid high contrast within the UI, looking at contrasting colors for extended periods of time is much more tiring to the sight...
Same goes for truly vivid colors.
Examples:
Looking at this color is more tiring than looking at this color or this color.
Looking at this color is more tiring than looking at this color or this color.
Looking at this contrast scheme is more tiring than looking at this contrast scheme.
Looking at this contrast scheme is more tiring than looking at this contrast scheme.
Looking at this contrast scheme is more tiring than looking at this contrast scheme.
Hope this helps! Specially since UIs for a MMO are to be seen for extended periods of time!
Maybe some of these changes don't seem noticeable, but they really do weight in the long run.
Edited by Audn, 25 September 2013 - 06:57 AM.