Color blind people tend to have better night vision and can sometimes see luminosity of colors that normal-sighted people can't. With this ability, and the fact that they perceptive colors differently, the U.S. Army discovered that the colorblind could see 'camouflage' colors that are hard to see with normal color vision. This gives them the unique ability to see hidden enemies better at night.
2. Crayola’s “Flesh” color was renamed Peach in 1962, reflecting the fact that flesh comes in many different colors. It was considered racist to imply that flesh is or should be of that color.
3. The color orange is named after the appearance of the ripe orange fruit. Before this word was introduced to the English-speaking world, the color orange was referred to as Geoluhread meaning reddish orange.
4. The colored dots found on aluminum soda cans near the nutrition information consist of all of the colors used in the can design. If a can makes it through production and its red dot, for example, is faded or absent, then laborers will be able to trace the problem to the single machine applying red color, without shutting down all of the machines.
5. The most common color for highlighters is yellow because it doesn't leave a shadow on the page when photocopied.
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Germany’s racing color is silver because, in 1934, one of their cars was barely overweight, so they just scrapped the paint off leaving the silver body. The car won and the color stuck.
7. The Sun is actually white. When viewed from space or a high altitude, it appears in its true color of white. When viewed from a low altitude, atmospheric rendering makes it appear to be yellowish.
8. Night vision goggles use green phosphor because the human eye can differentiate more shades of green than any other color, allowing for greater differentiation of objects in the picture.
9. There are colors that are too complex for the human eye called “Impossible Colors.”
10. The matador’s red cape does not need to be red to provoke the bull. The bull is color blind. The red color hides splatters of blood from the audience during the finale stabbing.
Redheads require up to 20% more anesthesia to be knocked out (compared to people of other hair colors).
12. A June 1918 article from the trade publication Earnshaw's Infants' Department said, “The generally accepted rule is pink for the boys, and blue for the girls. The reason is that pink, being a more decided and stronger color, is more suitable for the boy, while blue, which is more delicate and dainty, is prettier for the girl.”
13. On the set of the Sweeney Todd, the fake blood was colored orange to render correctly on the desaturated color film used.
14. The colors of fire hydrants give a reasonably accurate picture as to how much water flow and pressure they can provide.
15. In the Middle Ages, those who dyed blue fabric and red fabric were members of different guilds and were forbidden to dye any other colors than those of their own guild. Therefore purple cloth was rare.
16Anti-date rape straw
An Israeli chemistry professor named Fernando Patolsky has invented an “anti-date rape straw” that detects date rape drugs present in a drink and alerts the victim by changing color
17. Horses have the largest eyes of any land mammal, have excellent day and night vision, but they have two-color or dichromatic vision. Their color vision is somewhat similar to red-green color blindness in humans, where certain colors, especially red and related colors, appear as shades of green.
18. Most people dream in color, but those who grew up watching a monochrome television, there is a good chance that they dream also in black and white.
19. Cheddar cheese is only orange because they dye it. Originally, the color of cheese changed with season due to the cow’s diet. Farmers started dyeing it to eliminate seasonal color fluctuations. This escalated to the current day orange color.
20. Crayola's most senior crayon molder, Emerson Moser, when he was retiring after 37 years and molding approximately 1.4 billion crayons, revealed that he was actually color blind.
When UPS set up shop in West Germany in 1976, the company’s brown color scheme upset locals who still had fresh memories of the Nazi Party and its “brown shirts.” To defuse tensions, UPS had its employees wear green uniforms.
22. Pencils have been painted yellow ever since the 1890s. The world's best pencil graphite came from China. In China, the color yellow is associated with royalty, so American pencil manufacturers started painting their pencils yellow to indicate they contained high-quality Chinese graphite.
23. In the 1980s, a team in New York showed that an enzyme from green coffee beans could remove the B antigen from red blood cells, turning any blood type into group O, the universal donor.
24. Your veins look blue because subcutaneous fat only allows blue light to penetrate skin all the way to veins, so this is the color that is reflected back.
25. In 2009, a fruit grower named Ken Morrish in the UK was left stunned when he found an apple on his tree split exactly half green, half red down the middle. The fruit's striking coloring is thought to be caused by a random genetic mutation at odds of more than a million to one.