Despite the plethora of paints available in your local Home Depot, pigments are actually quite hard to produce. Pigment is a broad term for any substance used to color things, so it includes dyes and paint colorants. Making them is often a toxic process and new colors are rare. We can combine and blend, but truly novel pigments don't come along often. One of the most recent, a blue called YInMn, is the first new blue pigment in 200 years and is potentially worth billions. A new red would be worth even more, since most red pigments have trouble with stability, safety, opacity, or intensity. But it's hard to manufacture new hues. Many of the ones we have are ancient, or at least based on an ancient color.