The selected and unselected states of the vote-up and vote-down buttons here on Ask Different Meta aren't distinct enough for me to understand the difference. I'm including a screenshot that I just took:
This appeared next to a meta answer that I voted up, but it is hard for me to determine what black means and what gray means. I don't visit the meta side very often, so I'm likely to forget which is which.
Can the selected vote button have some more color (distinct from grayscale), either in the arrow segment, the outer circle, or both?