How does the color of stars relate to their temperature?

The sun is the first star in the group; it is a yellow main sequence star with a surface temperature of roughly 5000–6000 degrees Celsius. Orange stars, such as the star Betelgeuse in the constellation Orion, are supergiants, larger than the sun, with a surface temperature of roughly 3000–4000 degrees Celsius. Then there are blue stars, which are the brightest, largest, and hottest stars, with surface temperatures ranging from several thousand to over ten thousand degrees Celsius. Brown dwarf stars are the coldest stars; some of them are as cold as a cup of coffee.

The color of stars is directly related to their temperature. Hotter stars appear bluer, while cooler stars appear redder. This relationship is described by Wien's law, which states that the wavelength of maximum emission of a black body is inversely proportional to its temperature.