Scroll down in the 'Color' section, and pick the color you desire. If your color you want is not there, select one and erase the color and replace it with the color you want instead. Make sure the spelling is correct, or you will end up with tags which don't even work
When you are done with that step, just do [/color]. You always do [/___] (__- the tag that you are using) after your text you want in that certain color.