Systems and methods for changing the color of hair

A method for changing the color of the hair, comprising:

• (i) applying a first composition comprising at least one pigment to the hair, and
• (ii) applying a second composition comprising at least one color changing agent to the hair,
• wherein the hair is rinsed after the application of the first composition and before the application of the second composition,
• wherein the at least one pigment is capable of imparting a first color to the hair that can be changed to a second hair color by the color changing agent of the second composition, and
• wherein the pH of the first and second compositions are different.

A kit comprising:

• (i) a first container comprising a first composition comprising at least one pigment, and
• (ii) a second container comprising a second composition comprising at least one color changing agent,
• wherein the at least one pigment is capable of imparting a first color to the hair that can be changed to a second hair color by the color changing agent of the second composition, and
• wherein the pH of the first and second compositions are different;
• and
• wherein the at least one pigment comprises at least one anthocyanin.

A system for changing the color of the hair, comprising:

• (i) a first composition comprising:
• (a) at least one anthocyanin chosen from cyanidin-3-diglucoside-5-glucoside, optionally acylated with p-coumaric, ferulic, or sinapic acids, or combinations thereof,
• (b) at least one solvent chosen from water and organic solvents, and
• (c) optionally at least one additional component chosen from cationic surfactants, nonionic surfactants, cationic polymers, fatty compounds, amino silicones, thickeners, solvents, pH adjusters, preservatives, conditioning agents, or combinations thereof;
• and
• (ii) a second composition comprising:
• (a) at least one color changing agent chosen from citric acid, sodium phosphate monobasic, sodium citrate, sodium phosphate dibasic, sodium bicarbonate, sodium carbonate, or combinations thereof;
• and
• (b) at least one solvent chosen from water and organic solvents,
• wherein the at least one pigment is capable of imparting a first color to the hair that can be changed to a second hair color by the color changing agent of the second composition, and
• wherein the pH of the first and second compositions are different.