Synthetic solar spectra from the CO ⁵BOLD N59 model simulation, centered on 525 nm. The spectra are seen over gradually narrower wavelength ranges, decreasing by a factor of 3 for each row from top down. Left column: disk center: μ = cos θ = 1; middle: μ = 0.41; right: μ = 0.09. The intensity scale is common for all frames, and illustrates how the limb darkening is more pronounced at shorter wavelengths.