Card Colors for Trello for Chrome
More About Card Colors for Trello
22.214.171.124 - Fixed issue with changed classes
126.96.36.199 - Reduced CPU load by only updating the DOM when there are changes
188.8.131.52 - Fixed some style issues and added an option button to select between 'merge' and 'use first label color'-mode to the top left menu.
184.108.40.206 - Should play more nicely with stickers now. If not - let me know.