A study shows that the racial composition of the people in your dreams tends to reflect the racial composition of the people you see in real life.

For example, if you spend most of your time around black people, most of the people in your dreams will be black.

This doesn't really suprise me, to be honest.

I've had a look at the original study, and it seems that people's dreams are also sometimes influenced by stereotypes of different races that are perpetuated by the media.

The idea that the races of people in dreams reflect your experiences with different races in waking life supports the Continuity Hypothesis.