The present invention relates to a cosmetic composition comprising, in a cosmetically acceptable medium, a colorant comprising an inorganic fibrous matrix with tunnels and organic dye compounds incorporated at least partially in said tunnels, said compounds being selected from the indigoids, and present in an amount such that the weight ratio of colorant to matrix is greater than or equal to 0.028.The invention also relates to a method of cosmetic treatment of keratinous materials, comprising the application of said cosmetic composition.
