So. I decided to digitally draw this image that I see when I close my eyes and press on them. After a short research I discovered that it is a well known phenomenon called "phosphenes".
But an image search didn't yield a visual image of those things.
I was surprised to discover that I could create one that resembles the real thing. Initially, I thought those colors can't be replicated in real life because they don't really exist in the real world, but actually I think they do. It's a very bizarre color combination and certainly not one we normally see in the world with our eyes open.