Different gases in our sky glow in different colors when hit by solar particles.

When the electric space particles hit our air, they crash into natural gases. This makes the gases glow. It works exactly like a neon sign in a shop window. The color depends on the gas. Oxygen about sixty miles up glows a bright green. If the storm is extra strong and hits nitrogen lower down, we get beautiful purple and blue lights. High-up oxygen glows a rare, bright red.