There are some games that support colors in playernames. They use colorcodes.
Let's say ^2 is green and ^4 is blue.
Then ^2Na^4me looks like Name.
This tool has files that contain sets of colorcodes.
So you may edit them/add new colorcodes and set them for the game you wish.
The file is structured pretty simple.
Just like this (without the quote marks):
It is also possible to use the name of the color (exactly as in html).
NOTE: This does not apply to the background colors. They always have to be hex values.
For better readability you may also define a background color for players, bots and a standard color!
The background can also be set to transparent, but I don't suggest that for for colorful games ;).
Instead of a colorcode use the following keywords: