That’s because, even though those colors exist, you’ve probably never seen them. Red-green and yellow-blue are the so-called “forbidden colors.” Composed of pairs of hues whose light frequencies automatically cancel each other out in the human eye, they’re supposed to be impossible to see simultaneously.

See what happens when you mix together the three primary colors of light: red, green and blue.

13 Incredibly Obscure Colors You’ve Never Heard of Before

• Amaranth. This red-pink hue is based off the color of the flowers on the amaranth plant.
• Vermilion.
• Coquelicot.
• Gamboge.
• Burlywood.
• Aureolin.
• Celadon.
• Glaucous.

green eyes

1. Lapis Lazuli. Lapus Lazuli is a blue mineral so rare that in the Middle Ages and the Renaissance it was actually more valuable than gold. Today it is still a much sought-after stone prized for its intense blue hue.

Red

I guess we can end the discussion of rarity by suggesting that perhaps one of the rarest of all their colors is the infamous “C-Rex” color crayon from 2003.

The brown dyes always have the longest staying power. In fact, brown is a most common natural hair color, which pierces the hair more extremely than other hair dyes.

In 2002 Karl Glazebrook and Ivan Baldry computed the average color from all the light we see from stars and galaxies today to determine the current color of the universe. It turned out to be a pale tan similar to the color of coffee with cream. They named the color cosmic latte.

Scientists have found that the color blue didn’t exist for ancient peoples, particularly the Greeks. In ancient Greek texts like those attributed to Homer, there was no mention of the word blue at all, explained Radiolab. Black and white appeared hundreds of times, but other colors — red, yellow, and green — were rare.

Explanation: Here are the true colors of planet Earth. Blue oceans dominate our world, while areas of green forest, brown mountains, tan desert, and white ice are also prominent. Oceans appear blue not only because water itself is blue but also because seawater frequently scatters light from a blue sky.

white

light grey

Mercury: gray (or slightly brownish). Mercury has practically no atmosphere, so we just see the rocky surface. Note that many images of Mercury (like this one) are grayscale, derived from a single color filter.

Colour therapy is also the foundation for Vedic gem therapy and basic colours of the planets are: SUN—Red (transparent), MOON—White (opaque), MARS—Red (opaque), MERCURY—Green, JUPITER- Yellow, VENUS—White (transparent), SATURN—Blue.