Abstract: Disclosed is a method for coloring an article to be colored, which comprises contacting and reacting, in the article to be colored, (a) at least one aromatically bonded isocyanate compound with (b) at least imino compound being capable of forming a color by the reaction with the isocyanate compound and having at least one>C.dbd.NH group to effect the color formation, and a color-forming material comprising the compounds (a) and (b), at least one of which is supported on an article to be colored. A color or colored image formed by the reaction between the compounds (a) and (b) is excellent in chemical and light resistance.

Abstract: A compound of the formula, ##STR1## wherein R is an aromatic compound selected from the group consisting of: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 which may be the same or different, are each selected from the group consisting of hydrogen, chlorine, a C.sub.1-2 alkyl group and a C.sub.1-2 alkoxy group and wherein Y is --SO.sub.2 --, --O--, --S--, --CO--, --N.dbd.N-- or --NHCO--; X is a halogen atom selected from the group consisting of chlorine, bromine, and fluorine; and n is zero or an integer of from 1 to 4. The compound is useful for pigments having hue from the yellow shade to the red shade and having especially high chroma. The pigments also have improved weather resistance, chemical resistance and tinting strength.