The charts from RT's link to Opticampus are from "Spectral Transmittance of Lens Materials" By Daniel Torgerson OLA 1998.
Blue light transmission of various tints and materials, plano spheres.
Brown #3 CR39 1.8mm 1.9%
Gray #3 CR39 1.8mm 10.6%
Green #3 CR39 1.8mm 16.8%
Photogray Extra Darkened 2.0mm 25.7%
Photobrown Extra Darkened 2.1mm 21.1%
Photogray Thin & Dark Darkened 2.0mm 16.7%
Here's the spectral transmittance of clear polycarbonate and the methodology.
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