Which type of hair color is best for covering gray hair?

Permanently formulated color is the best choice for covering gray hair because it contains a higher concentration of pigment and is designed to penetrate the hair shaft more deeply than other types of color. This formulation provides a long-lasting result, as it alters the hair's natural pigment structure, ensuring that the gray is effectively concealed.

Temporary colors typically coat the hair and wash out after a few shampoos, making them less effective for lasting gray coverage. Semipermanent colors do provide some level of gray coverage, but they are not as robust as permanent colors and may fade quicker, often lasting around 4 to 6 weeks. Color-depositing conditioners can enhance existing color and add shine, but they do not fully cover gray strands, as they mainly deposit color without the chemical transformation that comes with permanent dye. Thus, when it comes to effectively covering gray hair for an extended period, permanently formulated color is the most reliable option.