The recent rise in Spain of mixed unions between people born in different countries has brought about a significant increase in the number of multiethnic and multiracial individuals in the country. However, no research currently exists in Spain on the life experiences and identity processes of these mixed-parentage youth. Drawing on 124 in-depth interviews, this article examines the narratives of ethnoracially mixed descendants from diverse backgrounds in Catalonia, Spain. Our results show that identity processes and experiences of being mixed are very heterogeneous and multifaceted, and that some individuals have more choices, versus constraints, when navigating mixedness. A crucial factor affecting these outcomes is visibilityi.e. visible markers of difference from the native society, such as phenotype, language, or religious affiliation. We find that while ethnoracially mixed individuals who have more outer characteristics shared with the native majority population can develop more advantageous, symbolic, and malleable identities, individuals whose heritage involves an ancestry that is negatively minoritised within the country of residence experience greater identity mismatch, stigmatisation, and discrimination. This finding is at odds with the 'postracial' or 'colour-blind' future that might ostensibly be heralded by an ever-growing Spanish population of mixed individuals.