Abstract: A reactive navy to black dye composition comprises component A and component B. Component A is one or more selected from the group consisting of dye compounds of formula (I) and alkali metal salts thereof, and component B is one or more selected from the group consisting of dye compounds of formula (II) and alkali metal salts thereof, based on component A and component B, component A has a mass percentage of 5% to 50%, and component B has a mass percentage of 50% to 95%. The present invention also provides a reactive navy to black dye product comprising the reactive navy to black dye composition. The reactive navy to black dye composition and dye product thereof with properties such as good fastness to washing, high degree of fixation and good build-up, which is suitable for printing and dyeing of nitrogen-containing and/or hydroxyl-containing fiber materials and blended fabrics thereof.

Abstract: A reactive dye compound and preparation method and application thereof. The reactive dye compound is a compound of the following formula (I) or an alkali metal salt thereof, in formula (I), D1 and D2 are each independently the group of the following formula (a) or (b). The reactive dye compound is capable of applying in printing and dyeing of cellulosic fibers, polyamide fibers or their fabrics. The reactive dye compound of the present invention has a novel structure, good washing fastness and rubbing fastness, and good fiber-bonding stability, and are suitable for dyeing and printing of fibers such as cotton, rayon, silk, viscose, and wool.