Color is an illusion.
Color as we know it, does not exist in the outside world beyond us, like gravity or protons do. Instead Color is created inside our head. Our brain converts a certain range of the electro-magnetic spectrum into Color. Now you can measure the wavelength of radiation to determine what color is being displayed, however you can’t measure, or observe the experience of a color inside another person’s mind. This begs the question, Is your red the same as my red?
Although we can both look at the same strawberry, and agree that is RED, our perception of what RED looks likes could be completely different from one another. Even though we’d still be able to agree on the color of the strawberry, we’d never know just how different our internal experiences were.
This matters because it shows how fundamentally, in terms of our perceptions, we are all ALONE in our minds.
Philosophers call these ineffable raw feelings Qualia. It is our inability to connect physical phenomenons to these raw feelings, to explain and share our own internal Qualia. Such as explaining what RED looks like to you, or how pain FEELS, this is known as the Explanatory Gap. This gap is confronted when describing color to someone who has been blind their entire life. you could try and explain the RED is HOT and BLUE is COLD, but to someone who has never seen a single color, Well that just seems, weird.
Food for Thought:
The perceptions of our individual minds are our own unique ways of seeing this world. Our Qualia is uniquely ours, unlike any one elses. and even if they are, you would never be able to know if Your Red is the same as my Red.