... Star Colors in Orion . ... Red stars are cool, with surface temperatures of around 3,000 kelvins (K) , while blue stars are hotter and can have temperatures over 30,000 K. Our own lovely "yellow" Sun's temperature is a comforting 6,000 K. Differences in star colors are particularly easy to see in this intriguing composite view of the constellation Orion, made while experimenting with a star trail step-focus technique . ... Publications with keywords: Orion - color - star . ... Frosted Leaf Orion . ...