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Fig. 1.

Fig. 1. Refer to the following caption and surrounding text.

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Colour-colour diagram of Flagship2 galaxies free of flux errors plotted according to the corresponding true redshift. Blue represents the lower-redshift sources and red the higher-redshift sources [0 ≤ zobs ≤ 3], exemplifying the non-linearity and degeneracies of the colour-redshift relation.

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