Inconsistent reputation color makes my eyes hurt.
Blue jumps out too much from the green and grey.
It disturbs the peacefulness of my profile.
Well, that is a status-bydesign. The blue color is to stand out from the white to let the user know that he/she has earned some reputation. Just visit the tab and it will be gone. Simple. The green stands out from the grey for the same reason: to let the user know he/she has earned extra rep. Maybe red for negative rep? You should be proud that the programmers made the blue stand out. How else will you know you had a rep change for that site specifically?