Touching Blocks of Your Color (Picked out of 3) Damages You.

Note: All blocks are added by hand, so there may be some weirdness

Colors:

Red: Can't touch red blocks
Blue: Can't touch blue blocks (Including water)
Green: Can't touch green blocks

Commands:

/color <red|blue|green> - Changes Your Color

Info:

Looking at a block will show you it's color in your hotbar