That's the entire problem with this theory. The designer does NOT know what my computer screen renders. Not every computer is a Mac with a 400+ nits display or

That's the entire problem with this theory. The designer does NOT know what my computer screen renders. Not every computer is a Mac with a 400+ nits display or has the same contrast ratio. The optimal "gray" therefore varies across screens. In my case, anything above #333 is capable of producing problems, the range #333 to approx. #444 is problematic with thinner font weights and anything above #444 is easily, noticeably terrible with anything except heading weights.