WASP-76 b abundance parameter posterior distributions. The dashed diagonal lines in the pair-wise panels mark boundary when both variables have the same metallicity enhancement (with respect to solar values). The values at the top of each histogram panel report the median and boundaries of the central 68% credible interval for each marginal posterior. The shaded area in the histogram panels denote the span of these credible intervals. The black curves at the left edges show the contribution functions over the CHEOPS, TESS, HST, and Spitzer bands.