EXAMPLES OF COLOR TOOL USES
One good use for the Color Tool is to get an overview of the perceptual organization of the colors available on a display. The "Choose by Hue" and "Choose by Lightness" color selection panels let us look at representative samples of all of the colors in the 3D gamut of a color display. Users who don't have extensive training or experience with applied color perception (and maybe even a few who do have color training) can quickly see a few things about the visual possibilities supported by the display by browsing through this space.
We can also use the tool to seek a color with particular visual properties. For example, suppose we want to find a cyan (blue-green) that is both highly-saturated and bright. We can find it with the Color Tool using either panel.
The tool can help with development of color schemes for complicated information displays. The organization of the color selection panels supports better understanding of the perceptual consequences of particular color choices than with other color pickers.