Simulated JWST spectra for different atmospheric compositions of HD 86226c. The colored data points show JWST NIRSpec/G395H mock data of three transits, simulated with PandExo (Batalha et al. 2017). Colored contours show 1 σ percentiles drawn from the posterior distributions of the pRT retrievals on the simulated data. Simulated spectra are based on three edge-case atmospheric scenarios that are feasible based on the pRT fits to the HST data in Sect. 5.1: high-metallicity (M/H] > 2.5) solutions with a cloud-deck below −1 bar (green), high-metallicity solutions with a cloud-deck above −3 bar (purple), and low-metallicity ([M/H] < 1) solutions with a cloud-deck above −3 bar (gray, data points removed to avoid clutter).