BGCOLOR Color Chart is a set of 8 files:
All files are written using JavaScript. Without activating JavaScript, you can only see two color tables: THE SIXTEEN W3C COLORS and NETSCAPE COLOR NAMES.
DETAILED CHART is similar to FULL-RANGE CHART. The color space represented as a cell in the previous chart is now shown as a 5x5x5 cube. In addition to going to MORE DETAILED CHART, you can move around in the color space on this chart. The radio buttons now allow you three choices: more detail, move, and invoke color viewer.
MORE DETAILED CHART is 2-dimensional. You see a 16x16 field of colors, which displays only one plane in the 16x16x16 cube represented by a cell in the previous chart. You can raise or lower this plane by clicking on a number shown beneath the chart. Clicking on a color invokes COLOR VIEWER.
There are two COLOR VIEWERS, one showing the color corresponding to an RGB number and one showing the color assigned by a "name." You can enter a value and click the button to see the color for the value. In the RGB viewer, you can add or subtract the values for R, G, and B, and see how the color changes.
Viewing all 16,777,216 different colors, of course, requires a true-color monitor. However, examining how colors are shown on high-color and 256-color monitors may be an interesting (and often important) step in determining the colors to use.