What is ColorCube Palette? (2003) It is a 3 dimensional representation of color. All the colors we see fit together into a 3D structure, a cube, which has the primary colors and black and white as its corners. If you could jump inside this cube, you could literally see what colors happen in any direction, from any starting point. You could stand on purple and look toward pink, or stand on brown and see how far away orange is in one direction, and how far away blue is in the other. If you want to see muted, gray colors, look towards the center of the cube. If you want intense, fully saturated colors, look towards the corners and edges. For color families and themes, look at the cross sections and along planes.
ColorCube Palette is a simple representation of this infinity of color relationships. It has only 216 colors. You'll have to imagine the rest. Using it, you can see the ColorCube from any side. You can see horizontal, vertical and diagonal cross sections, and you can take the cube apart and put it together again using 216 tiny cubes. The gray viewing shields can be dragged around on top of the ColorCube so you can visually isolate a section of colors from all the rest to see what they look like alone.
I call my ColorCube a Palette because ideally, I would like it to function as one. Someday, I would like to build a ColorCube Palette that has all (or at least a few million) colors. It would be able to rotate in any direction and come apart along any plane or axis to show what colors are inside. It could be emptied of all colors and then a 3D trail or structure of colors could be built inside, of any length or shape, which could in its turn be rotated and seen from any angle. And the whole would function as a colorpicker with image editing software -- click on a color in the ColorCube Palette and it appears in your paintbox.
In the meantime, you can use ColorCube Palette as such with the help of a utility called WhatColor which fits in a corner of the screen and gives the color numbers of whatever pixel is currently under your mouse. It is shareware with a fully functional eval copy. Here's the link: WhatColor
Also, here are standalone versions (in the form of Flash Projector files) of ColorCube Palette for the PC and Mac you can download.