Surprise! There’s more to it. There’s another kind of tricolor called a dilute tricolor. The dilute effect comes from another gene for dilution (D). Dilution effects black coloring, turning it into a faded blue-grey color. A tortie who also has the dilute gene is referred to as a “blue creme” (or blue creme and white if she’s a calico dilute). - See more at: http://www.delightibles.com/calicos-torties-and-torbies-need-to-know-about-tricolor-cats/#sthash.y3wyCm4A.dpuf