I have never heard of anyone doing this. Thank you so much. I am one of the 8%. If I tell you a bank robber just left in a brown car, look for a green one. 
The dark color blind theme definitely helps me.
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Fortunately I am not part of the 8%, but I have family members that are, so definitely +1 for this feature. Although it doesn’t include all spectrum’s, I haven’t seen another solution that even tries to implement such a feature. Efforts are truly appreciated and the rest of the Web should follow this example. Thank you @GitHub
Another thank you for thinking about this!
Also a big thank you for the way you informed me about it, a blue dot in the corner, ready to read and enable when I was ready to see it instead of splashing it over my screen while I was on my way to fix something else.