Colorsets are easy. Go in to the blockland folder. Find the Default Colorset file. The colors are coded by numbers like 23 135 122 23 and such. With RTB its easy to track how youve changed the colors. First number is Red, second number is Green, third number is blue, fourth number is the opacity. You can add new colors, change the default, but too many colors in your set means the less addons you can have before blockland crashes.