liqd/adhocracy — pull request #889 by xi (2014-05-07 09:05:55+00:00)
Title: automatically choose button color based on contrast

While reading the compass changelog I found the [`contrast-color`](http://beta.compass-style.org/reference/compass/utilities/color/contrast/) function which allows to select on of two colors based on contrast to a third color.

In this pull request I used this function to determine the foreground color on buttons based on the background color.