Brown is not the most cheerful color in the spectrum.
It is a very serious color which is associated with the earth, dirt, or soil.
Autumn is generally brown and it represents a season of dormancy and conservatism.
The brown in your dream may be symbolic of physical reality and earthiness.
It may represent things in their “barest” form, and its interpretation may encourage you to add some light and depth into your daily life. See also: Colors