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Top bar showing double color for Drupal Answers for both main site and meta site.
AFAIK the color for top bar is #212121 as mentioned in the blog. Check out the below screenshot. I can see this in opera and firefox on windows 7. It looks not nice on profile picture area.
With background set to be 100% transparent, it looks like this:
The dark blue ends abruptly, creating double-colour effect after adding black semitransparent overlay.
I have pushed a fix for this. It will go alive after the next production build.
This actually appears to affect all SE sites which had a custom top-bar previously.
They're using a background: rgba(0, 0, 0, 0.8) to generate the "blackish" color for the top-bar. For a site like Stack Overflow, this is not a problem because the background behind it is white. However, on a site like Drupal, the background behind that is a header background image, which has a built-in background-color for the top-bar that starts to bleed through the 80% transparent black that's being used on top of it.
For example, I can also reproduce this on English SE:
#212121yesterday. I like the idea ofrgba(0, 0, 0, 0.8)- it should generate "almost black" tinted with the colour of a site. I just think that other parts of the themes should be fixed to really make it work.