For generations, the study of human skin pigmentation has been constrained by a quiet absence — laboratory models that replicate skin's architecture but omit the very cells that give skin its color. A research team has now addressed this foundational gap by constructing a three-dimensional skin equivalent that includes melanocytes alongside keratinocytes, allowing the two populations to communicate as they do in living tissue. Using single-cell RNA sequencing and computational signaling analysis, they found that this inclusion meaningfully shapes how cells mature — suggesting that melanocytes