The coolest stars are red. Hot stars are white. Very hot stars are blue. Stars come in different sizes. It can be brief - the names of the stars and a brief description.
Super giants are the biggest and the brightest stars.
They are more than a thousand times bigger than the sun. They live for only a few million years. Giant Stars are next in size. They are more than 100 times larger than the sun. Some are called Red Giants or Blue Giants.