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Students often use emojis to represent themselves in digital peer-to-peer learning. Using the Cognitive Reconstruction of Knowledge Model, we experimentally explored how peer characteristics (peer emoji skin-tone), in interaction with learner characteristics (participants’ own skin-tone), affect learning. Participants encountered a fictitious peer tutor (represented with an emoji of light or dark skin-tone), who presented a refutation text on genetically modified foods in an online learning scenario. Participants were 153 students; 75 encountered a light-skin peer emoji, and 78 a dark-skin peer emoji, in a between-subjects design. Results revealed that significant conceptual change occurred, but the peer tutor’s emoji skin-tone did not predict learning outcomes. However, learners’ perceptions of their peer tutor correlated with their perceptions of that peer tutor’s lecture.