This report provides a concise overview of hair coloring practices, focusing on the types of dyes used, including metallic, natural, temporary, semi-permanent, and permanent dyes. Emphasis is placed on the mechanism of permanent dyes, highlighting key components like dye precursors, oxidizing agents, and ammonia. Safety considerations, such as the need for patch tests due to allergenic potential, are discussed. Analytical techniques for quantifying dye components and detecting heavy metals are explored. The report aims to enhance understanding of hair dye chemistry, safety measures, and health implications within the context of hair coloring practices.