eLife assessment
Franke et al. explore and characterize color response properties of neurons in mouse primary visual cortex (V1), revealing specific color opponent encoding strategies across the visual field. The paper provides evidence for the existence of color opponency in a subset of neurons within V1 and shows that these color opponent neurons are more numerous in the upper visual field. Support for the main conclusions is convincing and the dataset that forms the basis of the paper is impressive. The paper will make an important contribution to understanding how color is coded in mouse V1.