Colors

What is colour? It is really difficult to define it objectively. I have often wondered how we might describe colour, to a blind person. I am yet to find a satisfactory answer to that rhetoric. 

However, colour is a delusion.

Yes, you interpreted that right, colours are a myth. They don't exist.

Colours are a product of millions of years of fine-tuning and grading of the meat inside our skull. The wavelengths received by the retina is fed into this meat. At this point, the information is just a wavelength of light, without any characteristic property attached to it. The brain takes in this data and uses its "pre-loaded" algorithm to interpret this wavelength. That's why Roses are red, Violets are blue and so on. 

It does not mean that roses are absolutely red. Or violets are absolutely blue. It is the brain that thinks that something is red or blue. 

Perhaps it is obvious, but another straightforward example is that of Infra Red footage. We often see them in black and white. However, it is just for our reference, and in reality Infra-Red, or for that matter any wavelength of light does not possess any colour.