The present disclosure relates to a composition for developing hair color comprising polyphenol, a method of developing hair color using the composition, a shampoo for developing hair color comprising the composition, and a method of developing hair color using the composition. According to the present disclosure, the composition for developing hair color comprising trihydroxybenzene produces the development of hair color in brown, dark brown, or black and has excellent color development enhancing power, color development lasting power, and anti-gray hair, without using amine compounds, irritating alkaline agents, and oxidizing agents.