ColorBurn is a Dashboard widget from Firewheel Design that generates a new color palette each day for designers to try out. The suggested colors also have the hexadecimal values for web design. There is an option to change the widget background from black to white to see how the colors look against each. With quirky names for the palettes and the ability to browse back through a 7-day history, it's a very useful little tool.
One of the biggest struggles a designer can have is trying to develop a color palette to use in a design. ColorBurn is that quick flash of inspiration that can get the creative sparks going.