Abstract: A dyeing composition for keratin fibers, including one or more direct dyes selected from HC Blue 18, HC Red 18, HC Yellow 16, and salts thereof, and tris-(hydroxymethyl)-aminomethane and salts thereof. A method for dyeing keratin fibers, including mixing the composition with a second aqueous composition having a pH in a range of 1 to 6 and optionally including one or more oxidizing agents to yield a ready-to-use composition having a pH in a range of 7 to 12, applying the ready-to-use composition onto the keratin fibers and leaving it for a time period in a range of 1 min to 60 min, and rinsing-off the keratin fibers and optionally shampooing the keratin fibers.

Abstract: A liquid hair dye composition comprising components (A) and (B), wherein the 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, and the 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.

Abstract: A liquid hair dye composition comprising the following components (A) and (B), wherein the 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.

Abstract: A liquid hair dye composition, comprising components (A) and (B), wherein the content (X) of component (A) in the composition is 1.5 mass % or more and 9.3 mass % or less, the content (Y) of component (B) in the composition is 9 mass % or more and 98.5 mass % or less, and the liquid hair dye composition satisfies the following formula (1) (with the proviso that a liquid hair dye composition which has the content of diol of 50 mass % or more and the content of water of 2 mass % or less is excluded), Y?10.875X?10.875 (1), (A) an azo dye of the formula (A-1), and (B) a monoalcohol and/or a diol other than alkanolamines.

Abstract: A liquid hair dye composition, comprising components (A) and (B), wherein the content (X) of component (A) in the composition is 1.5 mass % or more and 9.3 mass % or less, the content (Y) of component (B) in the composition is 9 mass % or more and 98.5 mass % or less, and the liquid hair dye composition satisfies the following formula (1) (with the proviso that a liquid hair dye composition which has the content of diol of 50 mass % or more and the content of water of 2 mass % or less is excluded), Y?10.875X?10.875 (1), (A) an azo dye of the formula (A-1), and (B) a monoalcohol and/or a diol other than alkanolamines.

Abstract: A liquid hair dye composition comprising the following components (A) and (B), wherein the 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.

Abstract: A liquid hair dye composition comprising components (A) and (B), wherein the 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, and the 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.