Sensory drive proposes that natural selection on non‐mating behaviours (e.g. foraging preferences) alters sensory system properties and results in a correlated effect on mating preferences and subsequently sexual traits. In colour‐based systems, we can test this by selecting on non‐mating colour preferences and testing for responses in colour‐based female preferences and male sexual colouration. In guppies (Poecilia reticulata), individual functional links of sensory drive have been demonstrated providing an opportunity to test the process over more than one link. We measured male colouration and female preferences in populations previously artificially selected for colour‐based foraging behaviour towards two colours, red and blue. We found associated changes in male colouration in the expected direction as well as weak changes in female preferences. Our results can be explained by a correlated response in female preferences due to artificial selection on foraging preferences that are mediated by a shared sensory system, or by other mechanisms such as colour avoidance, pleiotropy or social experiences. This is the first experimental evidence that selection on a non‐mating behaviour can affect male colouration and, more weakly, female preferences.