Although it's an interesting attempt, the first genre I thought of doesn't seem to fit the analysis. The predominant color scheme of classic horror was green and purple. TFA notes how green can connote the weird, but doesn't recognize the prominent role of purple in classic horror.
This might be because of two color processes (e.g. two strip technicolor or cinemascope) which were cheaper and excluded either yellows or blue hues. Purple (or magenta for bright spots) also is complementary to green so they tend to be used together.
Personally I always associated sickly yellow and greens with horror, but that seems to have been a trend perhaps.
Where do you draw the "classic" line?
I feel red/green/black was the most common scheme in the horror I saw as a kid ('70s-'80s), tho perhaps it was purple and not black..
Classic Horror generally means into the early 1950s. The genre changed a lot after that. So yeah, 70s/80s horror aesthetics were quite different.
Isn't '30s to '50s usually get called the Golden Age, with Classic being until the late '80s?
Huh, that's a new one to me. If some people are using it that way, I need to be careful about using "classic". In my reading, both Classic and Golden Age have been used to mean the era dominated by Universal Studios.