Here are some examples of how you can use earthy tones like beige, greens and browns together to create a light, soft and modern home.

Kitchen:

Raw bricks contrasted with soft brushy green plants.

Dining room:

Super soft minty green contrasted with a smokey brown and cream. That floating shelve mounted super-high on the wall makes the room appear taller.

Living room:

Cream, greens, brown and grey. Nice balance between pattern and texture.

Bathroom:

A modern rustic bathroom in greige, beige and brown. Cute lamps.

UPDATE: See the wall color of this bathroom here!

Bedroom:

Beige, olive green and dark wood. Clean lines and great color combo.

Most of these pics are from this site.