This theme is one of my all-time favorites. It has a clean layout, with proper color contrast for the text and tabs. The clutter-free design makes it visually appealing.

This is a really great theme if you don't mind missing borders. Surprisingly some of this developers other themes get more attention, despite not being as good as this theme. This one's a good find, unfortunately, its also going to probably be a difficult find, ad I stumbled across it after looking through hundreds of other themes first. It never popped up in a search, I got here from viewing the developers page.