Zoomed-in view into the lower-left panel of Fig. B.2, showing more data and details about how the redshifted Euclid SC8 galaxy SEDs populate this particular colour-colour space. The contours trace the point density with a logarithmic spacing. Template numbers 0–7 correspond to elliptical and lenticular types, templates 8–11 to Hubble types Sa and Sb, templates 12–18 to types Sc and Sd, and templates 18-30 to starbursts of various age and metallicity.