"Olo" is said to be a saturated blue-green - but some say the existence of a new colour is "open to argument".

The three main types of color blindness are red-green, blue-yellow, and monochromatic. Cones are a part of the eye that enables people to see colors. The extent and type of deficiency depend on ...

Here's how people with color blindness see the world ... Most people have three color cones in their eyes. Blue, green, and red. The ratio of light for each incoming color is then sent to your ...