Victor Engel's Netscape (6x6x6) Color Palette Map is a JavaScript page to aid selection of colors in an HTML document. It contains the best design I have seen for displaying the 6 x 6 x 6 set of colors in the Netscape color palette. The color chips are hexagonal cells, arranged in two main grids to show the graduations from black to color at the left, and from white to color at the right.

The display is highly dynamic, with fields showing the R, G, B codes in Hex, Decimal, and percent.

Some years ago, the NextStep operating system for NeXT computers offered the most advanced color picker I have ever seen. It was built into the operating system, so all applications use exactly the same color panel. When Pantone colors were added in one release, all applications automatically had the new facility!

With the magnifying glass at the top, you can drag a color from any application to the color well. The row of buttons below provide color selection from a color wheel (shown), RGB values, scene-scape values, or Pantone. Once you select a color, you just drag it back to any application window.

I've dragged a few color chips to the bottom row, where they are saved, for use in any application. See ColorPic for a freeware Windows program which is similar, but less capable.

KillerSite's NetScape Color Cube presents this image of the 216 colors that the NetScape browser uses in its color palette, with instructions on how to load it into Photoshop's color picker.

These colors are defined on the faces of a 6 x 6 x 6 color cube. Unfortunately, unfolding the cube as shown here gives a less-than-useful display.

Web Design Group presents a cgi script, which provides color table giving color names and RGB Color values (in Hex), just in case you want to say it in aqua, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, or even white, and yellow.