When you look at an apple and see the colour red, it’s because the apple itself is red, right? Wrong. The perception of colour is really just a visual effect.
There are six colours in the visible light spectrum (wavelengths of energy visible to the human eye), these include red, orange, yellow, green, blue, and violet. When light hits an object, some of it is absorbed while the rest is reflected. Cone cells in our eyes recognize this reflected visible light and works with the brain to translate it into colour.
To put it simply, colour is not inherent in objects, it’s the light the surface of an object reflects. For example, when an object is seen as red it’s a reflection of the wavelength of light our brain translates as red. We see white when all light has completely reflected off an object, and alternatively, black when all light is absorbed.
Cone cells in our eyes work in the daylight and help us determine the colour of objects, thus, those that are colour blind have faulty cone cells. To test how well you can actually see colours, take this fun Buzzfeed quiz.
To ensure your eyes are healthy and continue to operate at their fullest potential, book regular visits with your local doctor of optometry.