Blanqueamiento, or whitening, is a social, political, and economic practice used in many post-colonial countries to “improve the race” (mejorar la raza) towards a supposed ideal of whiteness. The term blanqueamiento is rooted in Latin America and is used more or less synonymous with racial whitening. However, blanqueamiento can be considered in both the symbolic and biological sense Symbolically, blanqueamiento represents an ideology that emerged out of legacies of European Colonialism, described by Anibal Quijano’s theory of Coloniality of power, which caters to white dominance in social hierarchies Biologically, blanqueamiento is the process of whitening by marrying a lighter skinned individual in order to produce lighter-skinned offspring.

Source: Wikipedia.