FIELD: cosmetology. SUBSTANCE: the suggested new dyeing composition for dyeing human keratin fibers hair, in particular, includes monocationic monoazo dyestuff of the following formula: 
, and, also, the method is suggested for direct and oxidizing dyeing where this composition is applied and, also, new compounds of the above-mentioned formula. The innovation enables to intensively dye hair being resistant to bad weather, washing and perspiration. EFFECT: higher efficiency. 39 cl, 2 ex
