You can't even get Duct Tape to stick to silnylon. I doubt very seriously that you will get a dye in the fabric.
The SWT comes in mostly gray. Ed said that there were a very tarps he made in a brown or green, but they are rare.
“Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it."