Radial metallicity gradient (in degrees) for the RGB (top) and supergiant (bottom) stars for SMC (left) and LMC (right). In all panels, the increasing stellar density is colour-coded from purple to yellow. The median metallicities of the annular regions are marked with pink stars along with their standard errors. Linear best-fits and segmented best-fits are shown in green and grey, respectively. The black vertical lines show the division of different segments at the location of the breaks in the gradients. Underlying Hess diagrams show the source-density distributions.