Concerning Rubbish bin color (luxamman in Mochkups): This color (purple) is also used for images containing software and probably more. So using red for emptying bin makes sense but the question remains for other messages. (I personally like the color very much – probably more so than the very cool blue…)
Again: Also consider backdrop states. Here the inactive button is way too bright to my taste. Probably just using no background (or a transparent one) as proposed by galgalesh in git #119 circumvents such issues.
The inactive button (like restore in trash with no item selected) doesn’t look right to me in active windows either. Maybe as a general rule colors should only be desaturated not changed in brightness which can lead to stronger contrasts (“Empty” in backdrop has much more contrast to the background (and much harsher/clearer borders) than “Run” in active window). Sorry for nitpicking, but details and consistency is probably the only areas where this theme is lacking.