Bright, modern office: Orange paint + chocolate-brown accents, originally uploaded by xJavierx.
Can't commit to a bright orange box? Try painting one wall a paler tone and keeping the others neutral.
Add dark wood furniture and chocolate-brown accessories for sophisticated contrast. Or go the opposite route -- bright white and pops of turquoise would look great in this space, too.
Desk from Dwell; paint from Fired Earth; carpet from Brintons.