I'm slightly colour blind and have an app on my phone that can simulate my deficiency. I take a photo and it shows the views side by side. I adjust it til they look the same and then show my wife (with her stupid perfect colour vision) and she can describe the difference in what I'm seeing.
On rare occasions she says what I'm seeing looks better, so it's not all bad
Top and bottom look the same to me, I am protan colour blind, red deficient. I see some red, but not all
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There are humans with a fourth color receptor in their eyes who may have a wider color range than your average person. Women only though, sorry boys.
Mantis shrimps have the most complex eyes in the animal kingdom and have the most complex front-end for any visual system ever discovered. Compared with the three types of photoreceptor cell that humans possess in their eyes, the eyes of a mantis shrimp have between 12 and 16 types of photoreceptor cells. Furthermore, some of these stomatopods can tune the sensitivity of their long-wavelength colour vision to adapt to their environment. (Wiki)
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https://viewtube.io/watch?v=Qts264cpvfs
TIL this was refuted. Instead it was determined that shrimps lack the brainpower to properly process which us why they have more photoreceptor cells. They actually see less color overall.
