This study examined relations between parental racial socialization messages (i.e., egalitarianism, racemute, and preparation for bias) and racial attitudes in a sample of 282 White young adults (ages 18–22) in the United States. Egalitarianism messages were positively related to warmth toward racial outgroup members, whereas preparation for bias was negatively related to warmth toward racial outgroup members. In both cases the relation between racial socialization and racial attitudes was mediated by internal motivation to respond without prejudice and fairness/reciprocity moral orientation. Contrary to our expectations, racemute socialization messages were not directly related to participants’ warmth toward racial outgroup members. However, racemute socialization predicted internal motivation to respond without prejudice and fairness/reciprocity moral orientation, which in turn predicted outgroup warmth. These findings suggest possible mechanisms by which parents’ messages about race and racism may shape youths’ racial attitudes.