This work shows the influence of odour condition in a hedonic evaluation task of colour. Perceptive effects of colours on the perception of odours are already known. This research is focused on the opposite cross-modal effect of the olfactory system on the visual system. During two pre experiments six colours (three pleasant/three unpleasant) and two odours (one pleasant/one unpleasant) were selected. In the main experiment 60 participants evaluate the six colours. In this experiment colour was coupled to three olfactory conditions (match/without odour/mismatch). The results show significant effects of colour and of interaction between colour and the coupled olfactory condition. The results are discussed with theories of the perception that include a cross-modal simulator in their fundamental processes.