For much of ancient history, the color blue was remarkably rare and difficult to produce. Unlike reds and yellows derived from easily accessible ochres, a stable, vibrant blue pigment was a precious commodity. The Egyptians, masters of ancient chemistry, were among the first to create a synthetic blue, known as ‘Egyptian Blue,’ around 2200 BCE, using ground limestone, sand, and a copper-containing mineral. This dazzling hue adorned pharaohs’ tombs and sacred artifacts. Later, lapis lazuli, a semi-precious stone imported from Afghanistan, became the source of ultramarine, a pigment so costly it was often reserved for depicting the Virgin Mary in medieval art. The story of blue is a fascinating journey of human ingenuity and the enduring allure of a color that once felt like a whisper from the heavens.