This page summarizes the spectral types of stars using the mnemonic "Oh Be A Fine Girl/Guy, Kiss Me" for O, B, A, F, G, K, and M categories. It details their temperature ranges, colors, and examples, ...This page summarizes the spectral types of stars using the mnemonic "Oh Be A Fine Girl/Guy, Kiss Me" for O, B, A, F, G, K, and M categories. It details their temperature ranges, colors, and examples, with O stars being extremely hot and blue, and M stars being cooler and red. Additional star types such as carbon RNS stars and low-temperature L, T, and Y stars are also included, complete with their own mnemonics.