Aurora borealis wallpapers

Real auroras are mostly green, from oxygen glowing about 100 to 250 kilometers up, with red and purple showing at the edges when a storm is strong. The generator below copies that layering: soft curtains that brighten toward the bottom edge, a few stars, and a dark ridge so the sky has something to sit on.

Green and teal read well behind white desktop icons. If you keep a lot of files on the desktop, push the ridge darker and lower the brightness of the middle color. For a phone lock screen, pick a tall size and shuffle until a bright fold lands in the top third, where the clock usually sits over plain sky.