A liquid hair dye composition comprising the following components (A) and (B), whereinthe content (X) of the component (A) in the composition is 1.5 mass % or more and 5.16 mass % or less,the content (Y) of the component (B) in the composition is 9 mass % or more and 98.5 mass % or less,the composition satisfies the following equation (1) (with a proviso that a composition in which the diol content is 50 mass % or more and the water content is 2 mass % or less in the liquid hair dye composition is excluded).Y≥；22.75X−；22.75 ； ；(1)(A) an azo dye represented by the following formula (A-2)(B) a monoalcohol and/or a diol other than alkanolamines
