Navy blue and black dyestuff mixtures, containing one or more thiopheneazo dyestuffs whose diazo component is derived from the 2-aminothiophene series and whose coupling component is derived from the aniline series, and one or more dyestuffs F whose absorption maximum is at a wavelength of 390 to 520 nm, where the amount of the thiopheneazo dyestuffs is 60 to 99% by weight, relative to the total weight of the thiopheneazo dyestuffs and the dyestuffs F in the mixture.
