I have found a bug where if you do not have a link enabled in the blog title, then the default colour will be used and not the one defined in the blog-template. There was a similar problem before, that was v.8.1, and the April release fixed it.
Update: Feb.2026: An old bug seems to have crept back in, the one with the post title.
Could you fix that again? Otherwise, you always have to go through PHP code to change the color. Thank you.