Issue type tags are colored purple, a color that I don’t like. Furthermore, I would like to be able to distinguish issue types by color; I had feature colored green, errors red, etc.

Submitted by Eelco Visser on 16 October 2010 at 17:31

For those who do not like purple :D Yellowgrass now allows users to override issue type coloring. You can now choose any color for any issue type. Since this breaks cross-site color consistency anyway, I also added purple as a choosable tag color. Available on next update (presumably somewhere this week).