Look up a wavelength

from tinycio import Spectral

# Look up a wavelength (nm) as CIE XYZ color
col_xyz = Spectral.wl_to_xyz(490)   # Float3([0.0320, 0.2080, 0.4652])

# Look up a wavelength as sRGB color
col_srgb = Spectral.wl_to_srgb(490) # Float3([0.    , 0.9257, 1.    ])
510nm

See: Spectral