How is a stars color related to the temperature?

A star's color is directly related to its temperature due to the principles of blackbody radiation. Hotter stars emit light at shorter wavelengths, appearing blue or white, while cooler stars emit light at longer wavelengths, appearing red or orange. Specifically, the temperature of a star can be estimated using the Wien's displacement law, which states that the peak wavelength of emission is inversely proportional to its temperature. Thus, by observing a star's color, astronomers can infer its surface temperature.