Theme lets me change the styleboxes for focus, pressed, hover, etc. But i can't find a way to change the hover color inside the drop-down menu itself:
It defaults to grey, but i'd rather have it consistent with my other colors.
I also can't find any way to change the look of the round checkmark on the left, only an option to change the texture for the arrow. (No way to remove the arrow/checkbox completely either, i cheated by putting in a 1x1 transparent pixel as texture.)
If this isn't possible via Themes, i guess the only way would be to cheat it in by code somehow...?