Quite good: distinguishes active tab via framing while text is a bit brighter nice white (though a light green would be better), and URL in location bar is also very visible. Background is contrasting dark purple.
https://live.staticflickr.com/65535/52672819714_e1152f1ea5.jpg
Thank God for eyes and thanks for this theme.

It's a beautiful theme, with one issue: when a file is downloaded, the download icon is colored dark grey which makes it look like it's disabled. Could you please change that to light dark?

Really nice theme!