The voting buttons on Meta Stack Exchangedon't fit to the site design's individual colour palette. Whereas they previously were light blue, as fitting to MSE's colour palette, they now seem to use the orange from Stack Overflow's design:
Image may be NSFW.
Clik here to view.
I know their shape has been unified to the default arrow in an effort to standardize the sites' theming. However, the colour mismtach is rather unpleasant since it is in stark contrast to the rest of the site's visual impression.
This has been brought up in previous feedback iterations, but it had been hinted that at least the button's colour would be based on the sites' existing design and themes. So maybe this is just a bug.