First of all, don't try to match a color in the Benjamin Moore paint line to the Sherwin Williams paint line. Thanks to differences in each company’s color blending techniques, you won’t receive the shade you expect!  If you crave a similar hue to Soft Chamois in Sherwin Williams color options, I recommend Sherwin Williams Pearly White. Please note that it has stronger gray undertones and less yellow than what you’ll see in Soft Chamois. Behr’s Rock Salt is also close, but it’s a wink creamier.