I don't know the shade of green carpet you have, but it's a good bet to paint your walls a cream color. It will match anything you choose in your furniture colors. You can also use a ighter shade of your carpet color. Bring it to the paint store & they can recommend something in the correct tone. Custom colors are very easy these days. And most stores don't even carry ready made colors anymore anyway.
I have green carpet in my basement, and the walls are painted a deep shade of green there. But that may be too dark for a living area. A masculine color to me, would be using a gray on the walls. But it depends on your furniture color also. You didn't say what room you were talking about either, but if it's a bedroom, you could use a shade of purple & that would look great. Wish I could help you more, but I'd need more information to go on. Good luck.
I have green carpet in my basement, and the walls are painted a deep shade of green there. But that may be too dark for a living area. A masculine color to me, would be using a gray on the walls. But it depends on your furniture color also. You didn't say what room you were talking about either, but if it's a bedroom, you could use a shade of purple & that would look great. Wish I could help you more, but I'd need more information to go on. Good luck.