The page change buttons in user profile "All actions" and "Responses" tab used to appear in a theme color for the site (e.g. blue on this Meta site).
However, as of a few days ago, these are instead appearing in orange, the theme color for Stack Overflow, on all sites:
It looks like a recent CSS change may have broken this color. The above screenshot was taken from my Meta profile, and the highlighted color should be blue, not orange.