Rest-frame colour-colour diagram classifying galaxies as either star forming or quiescent in the DAWN survey PL EDF-F catalogue. Star-forming galaxies are labelled as ‘SF’ and quiescent galaxies are labelled as ‘Q’. The COSMOS2015 (Laigle et al. 2016) stellar mass completeness has been assumed (see Fig. 12). The bounding region discriminating the two populations is provided by Ilbert et al. (2013). The fraction of quiescent galaxies decreases with increasing redshift, due to both physical and observational effects driven by the present DAWN selection function. Future catalogues selected on near-infrared imaging provided by Euclid will enhance both the detection and identification of quiescent galaxies out to z ~ 3.