static-1.20wmf5/resources/jquery.ui/themes/vector/jquery.ui.button.css
In vector there are several classes allowing adding colors to buttons (good idea, btw). But then, there is no significant difference from hover to active or focus state.
The most popular example of such a styled button is the article-feedback button on en.wp.
I expect at least 3 different states: default, hover||focus, active
Version: 1.22.0
Severity: minor
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=44855