“As you can see colours, other animals can’t” which you might have known. There is no colour in the universe other than what we see. There is a particular magnetic spectrum of line of wavelengths in which we can see colours. VIBGYOR which is the colour spectrum we see.
This magnetic spectrum of lines which we can see contains mainly seven colours. Other that spectrum are infrared and ultra violet rays which we can’t see with our naked eyes. These rays can be seen using respective machines and used for medical purposes.
Now the question is “what you see?” From your childhood you are taught with some colour is is called something. From your perspective the colour red may not be same as what I see red. Based on the receptors of brain, the colours which I see different from yours.
May be I see strawberry in a different colour from you but named red. May be you see greenery as greenish and I blueish but named green.
I can’t say how you see the colour red. But you can teach how you see the colour red in words may be a lot of words. And also I can pass an exam on how you feel that colour. But the final conclusion, I can’t feel how you feel the same for that colour. This type of situation is called “Qualia” by the scientists.
Every one has there own perception of theory which is called theory of mind. So every one has a different theory of minds. No one can know how you feel about things. But you can say and I can understand but I can’t feel the way you feel things.
We say chocolate is delicious. But nobody knows how you feel the taste. In the same way of colours nobody knows how you feel for that colour.