Bees are the undisputed champions of the pollination world. And their secret weapon? Sight.
Like us, bees are trichromatic. That means they have three photoreceptors within the eye and base their color combinations on those three colors. Humans base their color combinations on red, blue and green, while bees base their colors on ultraviolet light, blue and green. This is the reason why bees can’t see the color red. They don’t have a photoreceptor for it. They can, however, see reddish wavelengths, such as yellow and orange. They can also see blue-green, blue, violet, and “bee’s purple.” Bee’s purple is a combination of yellow and ultraviolet light. That’s why humans can’t see it. The most likely colors to attract bees, according to scientists, are purple, violet and blue.
Read more here: Bee Culture Magazine: How Bees See And Why It Matters