A new study has upended our perception of the colour wheel, revealing that purple is not a "real" colour in the spectral ...

blue and red start to come together. And that coming-together point is called purple.” That’s because it’s not a spectral color. Moreover, our eyes use cone cells to detect color—short (S ...

why didn’t people just combine blue and red? Illustration by Aurélia Fronty Q: I’ve heard that purple was called the royal color because purple dye used to be scarce. Why didn’t people just ...

However, certain plants do show off their purple colour. For example, the purple, red or blue anthocyanins in some flowers attract pollinators by strongly absorbing light in the ultraviolet range, ...