What about color matching?

The short answer is that we use an ICC color managed workflow for consistent and predictable output. We honor embedded input profiles and if there are none we assign our defaults of U.S. Web Coated (SWOP) v2 for CMYK, ColorMatch RGB for RGB, and Dot Gain 20% for grayscale. We do not adjust your files to "improve" the color. Please see the color matching guidelines for more information.