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Most people are trichromats, meaning their eyes have photorecptors for [[red]], [[blue]] and [[green]], but 2-3% of women (so far it has been seen in women only) are tetrachromatic. In addition to the primary colors they have another type of cone in between the red and green. Normally trichromatic people can differentiate about one million colors. Tetrachromats can differentiate upwards of 100 millions colors.<ref>[http://www.post-gazette.com/pg/06256/721190-114.stm]</ref>
Most people are trichromats, meaning their eyes have photorecptors for [[red]], [[blue]] and [[green]], but 2-3% of women (so far it has been seen in women only) are tetrachromatic. In addition to the primary colors they have another type of cone in between the red and green. Normally trichromatic people can differentiate about one million colors. Tetrachromats can differentiate upwards of 100 millions colors.<ref>[http://www.post-gazette.com/pg/06256/721190-114.stm]</ref>
==See Also==
* [[Color therpy]] in [[Ayurvedic medicine]]
==References==
==References==
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[[Category:Physics]]
[[Category:Physics]]
[[Category:Anatomy]]
[[Category:Anatomy]]
[[Category:Colors]]