A couple of days back, the color of the green box indicating reputation change changed to light blue. Ok, it's a winter bash thing, I get it. Or - maybe it wasn't. Anyway, now it's light green. Why? :-( ... the deeper green was much more emotionally satisfying, with nice strong contrast.
Darker green color was better from a usability and accessibility perspective. It had more contrast and it was easier to read thin white numbers on darker background.
I could live with a changed color only on the recent achievements box, but this is not the only place where color has changed. There are numerous other places like linked and related accepted posts, list of accepted questions and answers, etc....
I can barely read the numbers now and this is a great problem for me. Please revert the color to the old one.
And when we are discussing colors, some other colors (light blue were changed too, again for the worse).