There is a reason trains run on tracks. Anything else and there would be chaos in the rail yard.
been There are colors we don't see. Colors are visible wavelengths that pass thru the atmosphere. The near infrared and medium infrared wavelengths lie outside of human vision although they may been seen by some other animals. There are colors that some animals see but humans can't.
Have you ever thought about how hard it would be to describe a color that no one has ever seen? It would be impossible really. It would be like trying to describe how the number 39 smells. There is no point of reference.
I have a theory on colors and on the question of whether our futures are predetermined from birth or are just the random results of happenstance. I think the answer is both. Here's how it works: (I'm using an analogy of course) When we are born we come into life with a bucket of paint. The bucket of pain determines the path we set out on. Mine may be blue. Yours may be green. We will more through life in a predetermined direction. That direction will not change unless we do something to change it. This is what is called "free will". When we take actions that send us off our path even slightly or become involved in the affairs of others their paint and our paint mixes, sometimes just a little, but sometimes in a big way. We know that the mixing of paint changes the colors. If your red paint becomes all mixed up and stirred together with someone else's blue paint it becomes purple and so on. You are now purple and might take on an even different hue if you add another color. We are now off the path of the red paint you started out with and the trajectory of your life will never be the same. Some might explain this as fate or karma or reaping what you sow.
Now I wonder what the color of the paint that I was given might have been originally been and I think about what other colors might be out there that I cannot see and probably couldn't describe even if I could see them. And I think long and hard about the paint can that I came across in my path and stared at for years thinking it was red, convinced it was red, because I was told it was red and I believed that it was, I had faith that it was because of that belief even though I had heard whisperings and mutterings and careless words that I thought said" yellow" or sometimes "mustard" or "canary and I was sure it couldn't be, shouldn't be until there came a day when I awoke and looked at the can and saw that it was yellow. It had always been yellow. So maybe now it's mixed with my paint and I can't be sure of just what that color is anymore. I can only hope that the color is a color that people can see. Sunsets are different for me now. When I look at the orange sun setting I wonder how the orange got there and why. It's a mixture of red and yellow you know.