Inverted Color
It would be cool to have an .inverted property which would return an inverted Color object.
Nice suggestion, which type of "inversion" where you thinking of ? (a +0.5 in Hue ? and inversion of luminance ?) ... Please share if you have some ideas on this topic.
Intuitively I just thought about simple RGB-negative as in (255-{R,G,B}). .invert(using='hurr?') smells a bit enterprisey, but may also be an option if there many useful ways.
http://www.quora.com/Whats-the-algorithm-for-obtaining-a-hexadecimal-colors-opposite-in-the-color-wheel
Gives some nice hints... If you want to give it a try for simple .invert() with the simplest way to do an invert, I would probably accept your merge. Otherwise it'll have to wait a little.
See PR #21
+1