Giant, Easy Color Generating Tool
Hail Pixel has to be the easiest, and largest online color palette generating tool I have ever used. You simply drag your mouse around the screen to reveal the full spectrum of colors, and then you just click to save that color. Scrolling adjusts the saturation. Then you just keep repeating and making swatches. The best part is that you can see all the colors full screen and right next to each other. It is the simple things in life right? Enjoy it here!