Today I noticed another strange colors on Unix.SE buttons here and on Meta. There is not enough contrast in any of them, examples:
Previous colors/gradient were fine. Similar issue appeared week ago on AskUbuntu (my meta question). Not sure if it is the same issue, but it might be related. Buttons also appear in reviews, but I don't have any available at this time. Disabled button might look a bit different.
The text is really hard to read and when hovered, it is not much better (you can try bellow on the button).
Edit: Review queues are even more funny. Disabled buttons are not even shown:
Edit2: After fix, gradient is here, but the contrast on meta is still ... would say not sufficient:
Do I have to also add a kitten to have it fixed?