On Special:MessageGroupStats, the default color of the state "Published" is green (#AEA), it changes to white on hover mouse event, but it become gray (#AFAFAF) when the mouse leaves; contrary to other states, which return to their previous color. Tested on Opera 12.16, Firefox 38.0.1, Chromium 31.0.1650.63, and Opera 30.0.1835.59.
I propose to reuse the same original green when the mouse leaves a "Published" state to be consistent with behaviour of other states (I doubt the current behaviour is intentional, at least I find it weird).
I didn’t dive into the Translate code for now but I guess it would be easy to fix since it should be the same behaviour as other states. I guess this issue badly behaves with the wikitable CSS style.