sass/sass-spec — pull request #74 by malrase (2014-10-07 17:26:02+00:00)
Title: Adding test for sass/libsass#308 where colour names cannot be variable ...

...values in a CSS selector.

See here: https://github.com/sass/libsass/issues/308

And failing Sass here:
http://sassmeister.com/gist/6fb2f14b87e432241812