Hover your mouse over the background, and the engine will attempt to guess what colour it's touching. You can change the background by clicking on it. If you think that it got a colour wrong, you can correct it by pressing space.
Made for the SDS "Our Colorful World" Inspiration is from Windows' built in colour finder, which can do the same thing as this project. I got the code for the colour finder from @griffpatch. The code for choosing the colour's name was written by me.