According to SFGate Home Guides, the best colors to go with green carpet are light corals and/or pink with strong tints of white or mint. Alternately, a blue-based color on the walls gives a lively accent to green carpet.
While green is often a hard color to complement or match, at least when it comes to interior design, a green carpet is the exception. It is easily accented and complemented by the wall color. A green carpet can either be matched with pale colors, such as lighter greens or off whites, or can be complemented with colors ranging from nice, light floral pinks to cheery coral colors.