It's surprising that MA is still espousing that old myth since the true story was well documented in "Star Trek: The Official Guide to the Animated Series", published in 2019.
Hal Sutherland was not the problem.
According to an interview with TAS storyboard artist/character designer Bob Kline, colour director Irvin Kaplan simply liked the colour pink. Extract from page 26:
The reason pink was used has always been attributed to [Hal] Sutherland and Kaplan both being color-blind. However, that is not exactly the entire story. Sutherland was color-blind, but as it turns out, Kaplan was not.
"Pink equals Irv Kaplan," shared Kline... "Irv was in charge of ink and paint, coloring the various characters and props (and he would do it himself in his office, he would sit down with a cel and paint it). He was also referred to by many people there as the purple and green guy. You'll see it in a lot of scenes, purple and green used together -- that was one of his preferences. He made dragons red, the Kzintis' costumes pink. It was all Irv Kaplan's call. He wasn't listening to anyone else when he picked colors or anything."