Every facet of the world we experience is enriched by color. When we first open our eyes at dawn, we are met with warm hues that gently arouse our senses. Throughout the day, as we make our way through the world color guides us, informs us, warns us, and stimulates our senses. The photoreceptors in our eyes are well matched to the spectral output of our sun and their functionality has evolved over the years to help us survive. Color tells us when to stop at an intersection, when something is safe to eat, and whether we should go see a doctor about that mole on my arm. Color might give us a hint about which section you should sit in at a contentious sporting event, and color can tell us whether a gathering of people is a wedding or a funeral. Beyond the physical appearance of color, its primary importance in our lives is reflected in many aspects of the human experience. We describe political processes using color, with green parties aligned with environmental movements around the world, red is historically associated with the international socialism movement, and recently the United States has been subdivided into blue and red states. Even our emotional states are described by color, with angry reds, cowardly yellows, envious greens, and moody blues. These emotions can be intertwined with the colors of our physical environment. Our moods are linked to the colors in our homes, with warm colors like beige and cream, and cool colors like teal and grey. Color is obviously central to many expressions of art, from the bold primary colors of Mondrian, to Picasso’s blue period, to Seurat’s mixing of colors through the pointillism technique. Colors are often expressed in music, from Dylan’s Tangled Up in Blue, Prince’s Purple Rain, REM’s Orange Crush, and Coldplay’s Yellow. Of course, there’s even an entire genre of music described by color, namely the blues. In short, color is an intrinsic part of our very existence.