Primary Colors Are Red, Yellow and Blue, Right? Not Exactly

Primary colors are the blocks from which all other colors are built. But there's a lot more to know about them than the basic red, yellow and blue we learned about in kindergarten.

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三原色は青、緑、赤ですが、黄色と青を混ぜると緑になるのは何故ですか？ - Quora

Primary color - Wikipedia

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Primary Blue, red, and yellow are the primary colors on the color wheel

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