Infinity #4 is described as a "cool taupe." It's a medium-dark brown with warm, yellow undertones and a matte finish. It had good color payoff and wasn't as powdery as other shades in this palette, which made it a lot easier to work with. I don't think it's the easiest eyeshadow to use on bare skin, but it was manageable, and if you use a primer, it should help it blend more smoothly. (At this price point, though, it's disappointing no matter what.) It lasted for seven hours on me before creasing and fading. See comparison swatches / view dupes.