In this issue of Photonics Focus, we dive into the vibrant world of color—how we perceive it, how we create it, and how we harness its power. One feature unpacks the fascinating quirks of human neurology that shape our experience of color. Another explores how astronomers assign color to grayscale telescope images, transforming raw data into stunning visuals that both inform and inspire. And in a third story, we examine the development of far-ultraviolet C lamps—an invisible hue with visible impact—as a promising tool to combat harmful microbes.