>>7979142>200 KB or less.Anything with decent compression can get a file under 200kb. But yes, we can go lower. Many simple "image floating is space" backgrounds can go even SMALLER by just cropping the image. Set it as your background, centered, and have the rest of the space filled with a solid matching color. Telling it to tile an image works as well.
Irony: when you make a background thread in a section where the real space saving images aren't even allowed due to size restrictions.