Finding the right color combinations can be a challenge, and ultimately it comes down to personal preference. An interior designer can be an invaluable resource in situations like this, helping you decide which shades would complement the colors you already have to work with. If you're looking for a little more of a DIY route, you may find the Benjamin Moore Color Gallery to be useful. Find a color that closely matches your floor and when you click on the shade, it recommends complementary colors. Best of luck finding a sofa that's right for your room!