Blue pigments are substances that produce a blue color when added to materials like paint, ink, or plastics. They can be derived from natural sources, such as minerals like lapis lazuli, or created synthetically, like Prussian blue and Ultramarine. These pigments are widely used in art, design, and manufacturing due to their vibrant hue and stability. Historically, blue pigments have been significant in various cultures. For example, Egyptian blue was one of the first synthetic pigments used by ancient Egyptians. Today, blue pigments continue to play a crucial role in various industries, including cosmetics, textiles, and food coloring.