Mandatory information about my setup:

Have I searched the tickets before posting? How would I do that?
Have I searched the forum before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: 3.3.6
PHP version: 5.4.28
MySQL version: 5.1.59
Matukio version: 5.1.3
Direct link to the page that shows the issue: (unknown)


Description of my issue:
I would love to assign a colour to a category instead of editing the colour of every single event. How can I do that?