guardian/frontend — pull request #1900 by phamann (2013-10-07 16:18:02+00:00)
Title: Normalize colour values

This normalizes all of the colour values across the site with our new vocabulary, and gets rid of references to all old values.

```$c-neutral6``` is the new ```$medianMushroom```

![colours](https://f.cloud.github.com/assets/80089/1282001/0496bbec-2f6c-11e3-9c3f-63972fceca86.png)