First up, what exactly is color blindness?
Most color blind people are able to see things just as clearly as the rest of the population, the difference is
their inability to distinguish red, green, or blue light. The deficiency is the result of a mutation in the
X-chromosome – meaning women are more likely to be carriers than sufferers – and it can manifest in 3 main ways.
The most common is red/green color blindness, where sufferers mix up all colors which have red or green as part of the whole color. Those affected by
Protan color blindness are less sensitive to red light, whilst sufferers of
Deuteranopia have the same problem with green. For example,
a person with Protanopia will confuse blue and purple because they can’t recognize the red element of the color purple.
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The third type of color deficiency, Tritanopia, is the least common and refers to sufferers who struggle to distinguish blue or yellow light. The image below shows what the rainbow may look like to individuals with each of these forms of color blindness.
This being the case, what is the best color, "it" depends.