The second question should have a different color since I favorited 'tags'. While the RGB values I picked from the picture try to convince me of a difference between the background of the second question I can honestly not see it (I am a bit red-green color blind). Can we get something that looks actually a bit different for the 5% with a color deficiency?
The background color of page elements marked
tagged-interesting should be changed from the color
#fafafb. That color is basically indistinguishable from the default background. It should be darkened. The color
#eff0f1, which is already in the scheme for code blocks and blockquotes, would do fine.
I have flagged this as a bug. The site design clearly intends questions marked
tagged-interesting to have a contrasting color. This is a problem in implementation, i.e., a bug. Probably easily squashed.