That's just it - I don't see that aquamarine color anywhere in these classes. Is there a missing declaration that I have to add?

This same color also used for the background for the post navigation and thread management buttons:
[Linked Image]

But it doesn't appear in the Post Properties classes - which suggests it's not maintained there because it doesn't show up in the Preview.

Perhaps I should just scan the file on disk for a close hex color.