Early and late decliners and their observed properties. Top: Histograms tracing the distributions of the SFH decay proxy for Hα clumps (gold), F275W clumps (pink), and star-forming complexes (purple). Middle and bottom panels show F680N–F606W vs. F336W–F814W color-color diagrams for F275W clumps and star-forming complexes, respectively. Contours in the color-color diagrams trace 2D kernel density estimations tracing the loci of late (blue) and early (red) decliners (see text for details); dotted and dashed lines indicate BAGPIPES models of different ages and τ = 1 Myr and 50 Myr, respectively. The position of models with values of 10 Myr (stars) and 200 Myr (squares) along each of the lines of constant τ is marked in both diagrams.