Fawn, beige, tan, brown, whatever your preferred name for them, these colours are in many colour schemes through the use of timbers and leather (or faux leather). Browns are colours mixed untill they're all muddied. Mud is earth, and browns create a comforting, down to earth feel. Browns are warm and friendly, practical and dependable.
Browns can be so light they become off-whites. Most browns are also neutral colours, 'meaning they are well balanced and they don't compete for attention.
All colours are available in half strength or quarter strength.