Of earth and soil everything must grow. Brown starts there down to earth and gives us the impression of stability, structure and support. I mean really, that's what our homes of built of and on.
Of course like everything else shades change like autumn leaves. The lighter browns offer a welcoming friend with whom to share your deepest secrets.
Warmer browns like beige is practical, that's why we decorate our homes with hues.
Dark brown is rich and strong like coffee, giving confidence reliability and loyalty. All the illusions that coffee gives us day to day. (at least that's how mine works)
The down side, that side that is too much will come off as drab and boring.
Companies. UPS, M&Ms...coffee anything, chocolate-chocolate...