Don't let the name fool you - Kaleidoscope offers some very nice node setups for color manipulation in your scene.
Akash Hamirwasia writes:
Kaleidoscope add-on adds a small package of Nodes for Blender's materials. These nodes can help you make your scene more colorful and accurate to the real world.
The Spectrum Node allows you generate infinite color palettes that are aesthetically pleasing in any scene you create. The Colorful Spectrum Engine allows you to generate palettes based on color rules such as Monochromatic, Complementary, etc. The Palette can be modified, applied to a ColorRamp and can be managed in any number of ways.
The Intensity Node provides you with all sorts of pre-defined values nicely categorized so that you can use them in your node setups. You can choose any Glass IOR value or even any Blackbody Temperature Value, to make your lighting colors look correct.
You can save, load and sync all your favorite palettes and values. Both the nodes have support for animation as well. Kaleidoscope add-on is completely free to use, and you can always support me in keeping the add-on updated :)