ALL BLACK COLOR SWATCHES ARE PURE BLACK (100% K)
When using a black background, or if large areas of your artwork are black, it’s important to ensure your black color swatch is 100% K (Black) and does NOT contain any Cyan, Magenta, or Yellow color values (a.k.a. 4-color Rich Black). Using a black swatch built in all four colors may cause quality issues during printing and production. Additionally, please DO NOT use the Registration color swatch in your artwork.