Abstract Parental diversity ideologies are linked to their own interethnic prejudice, but how do they relate to children's prejudice? This study examined self‐reported endorsement of colorblind ideology and multiculturalism among mothers (138 White Dutch, 65 Turkish‐Dutch, and 45 Afro‐Dutch) of 6‐to 10‐year old children (55% girls), and its association with child interethnic prejudice. Endorsement of multiculturalism was lowest among White Dutch mothers, and endorsement of colorblind ideology was lowest among Afro‐Dutch mothers. Maternal endorsement of multiculturalism was negatively related to child outgroup prejudice among White Dutch families and among Turkish‐Dutch families in the context of underrepresented outgroups, and results suggest no or opposite associations for colorblind ideology. Future research should explore what parenting based on these ideologies looks like, but the present study points parents in the direction of a multicultural, rather than colorblind, approach.