Left panel: difference in transit depths between 4.5 and 3.6 μm normalized to the transit depth at 3.6 μm plotted against equilibrium temperature. The 1σuncertainties are shown in gray, and the color bar depicts the scale height in km. The shaded area on the left panel shows our grid of solar composition cloud-free equilibrium chemistry models; the extended lighter region is corrected for stellar variability. The dashed purple vertical line at zero is where planets with low-pressure gray clouds would lie. Right panel: deviation from the black body in emission against the equilibrium temperature, presented in Baxter et al. (2020). The color scale shows the scale height in km and the shaded region shows the grid of models containing temperature inversions.