Purple pak choi gets its striking color from anthocyanins--potent antioxidants that boost nutritional value. Yet the genetic switch behind this trait has remained elusive for decades. Now, researchers have assembled a near-complete genome of purple pak choi and uncovered an unexpected story: the key color gene, BraMYB114, did not originate in pak choi itself. It was borrowed from a distant relative through natural hybridization. This discovery solves a long-standing mystery in Brassica genetics, explains why the gene was so difficult to locate, and provides breeders with precise molecular tools to develop anthocyanin-rich vegetable varieties with enhanced health benefits.