Brown denotes worldliness, practicality, domestic and physical comfort, conservatism, and a materialistic character. Brown also represents the ground and earth. You need to get back to your roots.
To see or collect dream chestnuts means that a person, once stopped loving you or ohladevshy to you again kindled a passion.
The color brown can represent:
Earthy or natural
Plain or basic
Autumn, which can represent the "winding down" of a phase or cycle