A lighter shade can work just as well for highlights or text. A very useful colour. Tranquil, mature, safe and secure. The colour of nature, Green is organic and fertile. Green has a calming, balancing effect.
Bright green can be extremely overbearing, but a dark green is tamed and can be very useful.
A deep forest green can be used as a successful background colour. Like black and white, of which it is composed it can be used with any colour. Informal, earthy and sad. Brown is not a power colour. Powerful, elegant sophisticated, and authoritative, Black commands respect.