What does the color of a star depend on

This question was on my semester final and I'm not sure what the answer is. I know it is either temperature or chemical composition. I put down temperature but I talked to alot of people who told me they said it depended on chemical composition

It's temperature... The chemical composition will affect the absorption spectrum, but color depends on temperature, and temperature depends on size.

There is an obvious correlation between a star's color and its temperature.
As for chemical composition, it is much less obvious.

The color of a star determines the temperature. Cool stars are red, blue stars are hot, and the sun is yellow.

It's mostly temperature, but chemical composition has an effect as well.