Distribution of [O III]_λ5008 luminosity and UV absolute magnitude of the Uchuu mocks and C1F. The black, pink and green histograms represent the distributions in Uchuu with random directions and centered in objects with similar L_[O III] and M_UV to COLA1, respectively. The dashed histograms represent all the objects in the field, and the solid ones only the detected objects. The bins of the three versions of the mock are slightly shifted for visual clarity. The solid gray histograms represent the distributions of the C1F [O III] emitters. The distributions of C1F match the ones of the Uchuu mocks, after running the detection algorithm.