You're absolutely right! The color of a star is a direct indicator of its temperature. Here's the breakdown:

* Red Stars: These stars are cooler. They emit most of their light in the red part of the spectrum, which is lower energy.

* Blue Stars: These stars are hotter. They emit most of their light in the blue part of the spectrum, which is higher energy.

Think of it like this:

* A red-hot piece of metal is cooler than a white-hot piece of metal.

* A blue flame on a stove is hotter than a yellow flame.

So, the reddish star is cooler than the bluish star.