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Test: How many colors you see can determine how many color receptors you have | KFOR.com Oklahoma City
![National Geographic TV on Twitter: "Let's test out your brain's ability to differentiate between colors. How many shades of red do you see? #MindBlowMondays https://t.co/Wa4gld1ACH" / Twitter National Geographic TV on Twitter: "Let's test out your brain's ability to differentiate between colors. How many shades of red do you see? #MindBlowMondays https://t.co/Wa4gld1ACH" / Twitter](https://pbs.twimg.com/media/Eh5x2wNWkAY073L.jpg)
National Geographic TV on Twitter: "Let's test out your brain's ability to differentiate between colors. How many shades of red do you see? #MindBlowMondays https://t.co/Wa4gld1ACH" / Twitter
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