Same Luminance Colors

The 216 colors in the standard "web-safe" colormap include 54 sets of colors which have the same NTSC luminance as each other, and 76 pairs of colors. If you allow luminances that differ by one there are even more - 105 sets with 265 pairs. These colors might be used to make web pages that are readable on the screen, but when printed show up as blank. Most of the color pairs are not readable or attractive, but take a look for yourself and you may find some that you can use.

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