US Patent No. 10,596,084 B2
(Venda Maloney, Suman Chopra, Hallena Strotman, Guisheng Pan); Colgate-Palmolive Company
has patented an oral care composition that contains an orally acceptable carrier vehicle that has a non-aqueous solvent and a non-covalent complex that has a blue to blue-violet color dye with a hue angle in the CIELAB system ranging from 200 to 320 degrees; and core shell silica particles (wherein each core shell silica particle comprises a silica core, and a surface of the silica core is etched with metal silicate). The composition also contains water.