Click the gradient to add new sliders.

Credits

This little program makes use of JQuery, JQuery UI, and Farbtastic, and was written by Bart Kelsey. The code contained herein (just view the HTML source!) is available under the terms of the GNU Affero Public License version 3.0. Shameless plug: If you'd like to see more of my work, can check out my website, OpenGameArt.org. ;)