* Color and Temperature: A star's color is a direct indicator of its surface temperature. Blue stars are the hottest, followed by white, yellow, orange, and red stars.

* Energy and Wavelength: Hotter stars emit more energy and their peak emission falls within shorter wavelengths, like blue and ultraviolet light. Cooler stars emit more energy in longer wavelengths, like red and infrared light.

So, in summary:

* Blue Star: Highest surface temperature, emitting most energy in blue and ultraviolet light.

* White Star: Intermediate surface temperature, emitting a mix of colors.

* Red Star: Lowest surface temperature, emitting most energy in red and infrared light.