Hi Brenda,

Sunspots are regions of very intense magnetic fields and look black because they are relatively cooler than the rest of the surface of the Sun. The surface of the Sun is in constant motion, allowing heat to move from the inner regions of the Sun to the upper regions on the surface, making it very hot. A strong magnetic field slows down this motion and prevents heat from moving up to the surface. So, although sunspots are still somewhat hot, they are not nearly as hot as the surrounding area which makes them appear darker.

Holly