A liquid hair dye composition comprising components (A) and (B), whereinthe content (X) of the component (A) in the composition is 1.5 mass % or more and 6.5 mass % or less,the content (Y) of the component (B) in the composition is 9 mass % or more and 98.5 mass % or less, andthe composition satisfies the following equation (1):Y≥；(91/6)X−；(91/3) ； ；(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.(A) an azo dye of formula (A-3)(B) a monoalcohol and/or a diol other than alkanolamines
