No, In the Start Game GUI, Find the Colorset Thingy, And click that. it should be in there somewhere.If that phails, and there is no button, DL RTB and try again.
you guys do know of the old method without RTB, right?replace colorset.txt with the new one
The colorset file is in the Blockland folder. Go to it, open up config, then server, and you should find it. Open up the new colorset file, delete the text in the old one, and copy the new text in. That's all that you need to do.