This is great!

What is the visualization? How did you do the visualization? And where did you get the idea / what was your thinking leading to this really cool way to do it?

I love using web colors. It's basically all I use...I like that they're just there..and also you get "semantic css".

It will probably seem a dumb and naive question so I'm sorry, but...Looks like the blacks, whites and greys are compressed in the center, is that an accurate way to put it? Why is it like that? it's your project so it's not my place to tell you what to do, so I'm sorry to ask but would it be a bad idea to give a bit more space to the shades of grey / gray?