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What is the law of colour known for?

  1. Detailing cuticle lifting techniques

  2. Understanding colour relationships

  3. Describing the chemical composition of dyes

  4. Outlining the process for permanent waving

The correct answer is: Understanding colour relationships

The law of color is a concept in art and design that focuses on understanding the relationships between different colors. This includes how certain colors complement or clash with each other, as well as the psychological impact of certain color combinations. This is different from the other options listed, which focus on specific techniques or chemical components. Essentially, the law of color is a broader concept that encompasses many different aspects of color, and the other options are more specific techniques or processes related to hair and beauty.