Vegetable-based hair coloring is a temporary alternative to harmful chemical hair dyes that strip the color from hair. If you wanted to remove permanent hair color from your locks, it would require a special type of chemical solution often advertised as “hair dye remover.” This substance contains peroxide, which can be harmful to your hair. However, semipermanent vegetable hair dye contains natural ingredients, embedding itself in hair strands only temporarily. This makes removal easy and safe for your hair.

Shampoo your hair using a clarifying shampoo. Clarifying shampoos remove product buildup from hair and will help fade the color. Shampoo several times; each wash will remove some of the dye.

Rinse your hair with warm water. Warm water will help open the cuticles, which are microscopic, overlapping cells that protect the inner hair shaft from damage. Because the dye can penetrate into the hair shaft, opening the cuticles will allow the release of the dye particles.

Fill a cup or bowl with diet cola and pour it over your hair, making sure to rinse completely. Keep in mind that only diet cola, and not regular cola, should be used. This will also help speed up the results. Rinse hair with warm water until the cola is removed.

Allow your hair to dry in the sun. Although it is important to protect your hair, as well as your skin, from ultraviolet radiation, exposure to sunlight will help fade the color of a vegetable-based hair dye. Do not overexpose hair to ultraviolet rays; this can cause hair to become damaged and brittle.

Repeat Steps 1 through 4 until the hair color is removed. This may take several repeats, especially for darker colors such as red, purple or black.