Oxygen abundances in NGC 5427 as derived for H ii region complexes via photoionisation modelling. The oxygen abundance listed in Table 1 is colour-coded. Region 35 is left out, as the abundance has a large uncertainty. The grey-scale background image shows the Hα image in which unreliable measurements have been clipped. The nucleus is marked with a white cross. Note the presence of an abundance gradient with increasing abundance along the spiral arms toward the central region.