The stars that make up the constellation Leo, the lion, are not all the same color. They have a range of colors depending on their temperature:

* Blue-white stars: These are the hottest stars, like Regulus, the brightest star in Leo.

* White stars: These are slightly cooler than blue-white stars.

* Yellow stars: These are similar in temperature to our Sun.

* Orange stars: These are cooler than yellow stars.

* Red stars: These are the coolest stars.

So, when you look at Leo, you're seeing a mixture of colors, giving the constellation a vibrant appearance.