Multicultural and colourblind approaches to managing diversity are often conceptualized to be antagonistic. However, in principle, both have underlying motives for social justice, making it important to understand how they may be psychologically reconciled. In the present research, we examined dialectical thinking as an individual characteristic or condition under which people may endorse them in a conciliatory way. Across five studies (three pre-registered; N = 1899), using well-established materials that have measured and experimentally manipulated dialectical thinking, we found that individual differences in dialectical thinking were a replicable factor that moderated the relationship between colourblind and multicultural ideals. By contrast, situational priming of dialectical thinking did not reliably impact this relationship. Therefore, people with a greater propensity to view issues from multiple perspectives and to reconcile seemingly contradictory information appear more likely to take a harmonized approach to endorsing colourblind and multicultural ideals. Theoretical and practical implications are discussed.