Here's why:

* Star Color and Temperature: A star's color is directly related to its surface temperature.

* Red Stars: Red stars have the coolest surface temperatures, typically around 3,500 degrees Kelvin (K).

* Other Colors: As stars get hotter, they become:

* Orange

* Yellow

* White

* Blue

* Blue-white

Example: Our Sun is a yellow star with a surface temperature of about 5,500 K.