What do color blind people see when looking at red?

People with color blindness, also known as color vision deficiency, don't see colors in the same way as individuals with normal color vision. Red colorblindness, in particular, is called protanopia.

In protanopia, the red pigment in the cone cells of the retina is either absent or defective. This means that those affected have difficulty distinguishing red from green. Instead, they may perceive red as brownish or dark. Colors that are composed of a mixture of red and green, such as orange, can also be challenging to distinguish.

Different individuals with colorblindness may have varying degrees of difficulty distinguishing colors. While some may have a milder form where they confuse certain shades, others might experience more severe colorblindness, making it harder for them to differentiate between a wide range of colors.