HCL decomposition: cube1

This example shows the cube1 color scale, a variation by Matteo Niccoli on the cubeYF color scale from the same author, as well as its decomposition in the HCL color space (aka CIELCH). Copared to cubeYF, the cube1 color scale has a larger hue range, but slightly deviates from being a linearly increasing lightness scale (see the final part of the grayscale version).