This is by my friend Willco2. (He bought the game with Steam, so he cant post here.) For his first add-on, he had the idea to put the color-codes into a simple script.
You type in /colorLight and a few lines of the brighter colors will show up for 10 seconds:

You can then type in /colorDark for the darker colors and they will also show up for 10 seconds:

Download Linkhttp://goo.gl/WTNRsX
Please also note this isnt by me, you'll have to send error reports to Willco2.
This is
NOT a client-side add-on, Willco2 doesnt know how to make those (yet).