In this speech, King sets out a dream that he has for American society. The basic idea behind his dream is that there should no longer be racism and racial discrimination in the United States. During King's time, racial discrimination was legal in the United States. King dreamed of a time when such discrimination would not be legal. He also dreamed of a time when there would not be any racism. As he put it, he dreamed of a time when people would
not be judged by the color of their skin but by the content of their character.
In short, King dreamed of an American society in which people were color blind, treating people of all races the same.