Blue M&Ms didn’t exist until 1995, when a poll was held to replace the tan color M&M that was deemed redundant because of the brown M&M. – WTF Fun Facts
Source: https://phys.org/news/2013-09-mantis-shrimp-world-eyesbut.html
In some cultures and languages, the colors described in English as blue and green are colexified, or expressed using a single cover term. – WTF Fun Facts
Source: https://en.wikipedia.org/wiki/Blue%E2%80%93green_distinction_in_language
Tigers are orange in color because their main prey, deer, see them as green. Deer are only capable of seeing blue and green light, which makes them color-blind to red. – WTF Fun Facts
Reindeers eyes change to a blue color in the winter to help gather light during the dark arctic months and return to a golden color in the spring and summer.
– WTF Fun Fact
Every countries’ passport color is a shade of blue, green, or red – WTF fun facts
Surgery that will change brown eyes to blue – WTF fun fact
