Tetrachromacy is the condition of possessing four independent channels for conveying colour information, or possessing four types of cone cell in the eye. Each cone is triggered by different wavelengths of light. About one in 10,000 women are tetrachromats, and I am one of them.
March was the celebration of this year’s Holi Festival. This colourful Indian celebration has become world-famous. Although the origin stories have changed over time, the festival mainly celebrates good over evil. Covering each other with colours has also grown to be an expression of love, which is done on the second day of the festival, Dhuleti.
Being a child of the seventies and eighties, I got my introduction to color theory from the popularization of color TV. Color TVs produce their full range of color using a 3 colored system. Back when TVs had tube screens, the tubes had three electron guns that shot electrons at different colored phosphor sub-pixels, red, green and blue, tightly packed together to form a single color pixel. The electrons would excite the phosphor making it glow.
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