Are the stars different in color?

That's right. Every star is a big stove, and the color of the stove changes with the change of temperature.

If the temperature on the surface of a star is high, there will be a lot of blue light in the light, so that the star looks blue. On the other hand, if the temperature of the star is relatively low, most of the light is red, so it looks red.

White and yellow also appear at different temperatures. The temperature of the stars decreases slowly from high, and the process of color change is blue-white-yellow-red, which changes in turn.