: The most common kind of color blindness is red-green color blindness (which may be a defect in detecting red or in detecting green, but rarely both). So avoid relying upon distinctions in

@Turnbaugh909

The most common kind of color blindness is red-green color blindness (which may be a defect in detecting red or in detecting green, but rarely both). So avoid relying upon distinctions in the red-green part of the spectrum. (Light green and light orange will tend to appear the same to such people, for example.)

If you want to be especially cautious, you can place your colors on a blue-yellow axis (very deep blue; aqua; white; chartreuse; brown); all the red-green problems still render the individual able to tell that blue is different; yellow has the advantage of activating both green and red cones, so if there's a problem with either one, it's still plenty visible. Alternatively, any stretch where the brightness increases (e.g. red->yellow->white) is visible to most people. Don't assume that red is different than black, however.

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