Seems to be the solarized colour palette (or was inspired by it, at least): http://ethanschoonover.com/solarized

Looks fancy, but boy is it bad on the eyes. I've since switched away from it to harlequin ( https://github.com/nielsmadan/harlequin ).

I used to use Solarized but switched to Zenburn since then in my editor. That said, whatever color scheme they're using on that website looks really nice on the website, even if I wouldn't use it in my editor (I might though!)