Widening participation has been a strategic aim for UK universities for many decades. However, the goal of widening participation applies beyond higher education to regional institutions, such as the European Commission, considered the key institution in the EU due to having responsibility for a wide range of tasks including initiating new EU legislation. Diversity is important in the European Commission for the same reason it is important in all organisations. Although it created a pan-European scheme of Diversity Charters encouraging private and public bodies across the EU to promote diversity, a photograph of the new all-white Commission suggests it has forgotten to apply this to itself. Gender diversity is not the issue but in the twenty-first century, are all European women white? In order to address this lack of diversity, euro-centrism in the Commission must be tackled. This requires taking a “thicker” approach to diversity that emphasises knowledge production and knowing—re-evaluating what is understood as reliable knowledge, and “acting on that understanding by fostering more diverse communities.” To develop a thicker approach to diversity, I set the diversity agenda within decolonial theory and suggest that a decolonial approach can disrupt euro-centrism to promote diversity in the European Commission and in EU internal market law.