Stack Overflow features bright voted marks on question/answer, that almost immediately catch my attention when I land on a page:
I assume that it has to notify me that I've already voted for this question/answer, but why it is highlighted so bright? I can't even undo my vote by clicking on it after a certain time. Does it also bear another role or is there something I'm missing from the UX perspective?
On other sites it's not so bright e.g. on User Experience site: