This demonstrates the amazing dichotomy of the 1970's: browns and earth tones were huge - the 70's are often referred to as the "browning of America". Yet, there was also a tendency to spiral out of control in the total opposite direction with an explosion of loud colors. Go figure.
There was also a tendency to make rooms (usually the study or rec room) totally dark. With the dark wood paneling, the brightest light bulb you could find couldn't illuminate these rooms. They were cozy, in a medieval dungeon sort of way.