US Patent 11859790 Automotive lighting

A light guide has an elongated body that includes an entrance face at which light is admitted into the light guide and an exit face at which the light emanates from the light guide. The light guide has an inboard side wall and an outboard side wall extending between the entrance face and the exit face. The entrance face, the exit face, the inboard side wall and the outboard side wall enclose a medium containing a colorant by which the medium meets a color criterion while minimizing light absorption at a wavelength of the light.