Ultramarine blue is a vibrant, deep blue pigment that has been used in art for centuries. Originally made from the semi-precious stone lapis lazuli, it was highly valued during the Renaissance for its intense color and rarity. Today, ultramarine is often produced synthetically, making it more accessible for artists and manufacturers. This color is known for its stability and lightfastness, meaning it does not fade easily when exposed to light. Ultramarine blue is commonly used in painting, printing, and even cosmetics, providing a rich hue that can evoke feelings of calmness and depth in various applications.