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Originally Posted by Swampdude
BTW I just happen to have a purple piece of clear film, which I looked through at the BEHR yellow sample color on the white background, and it made no difference, it just gave everything a purple hue but i still saw yellow and white and everything else
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That's because I am an idiot. Purple light is not the opposite of yellow paint. Yellow paint reflects red and green, purple film accepts red and blue. Therefore yellow paint will not appear black through purple film, it would appear red. Green paint would be the opposite of purple film (and blue film would be the opposite of yellow paint).