Can shadow of light that goes through transparent colored material be of different color than the color of the material it goes through? This is a followup question on 'Why shadow of light that goes through colored glass becomes colored?'
The way I understand answer given is: more light from other color spectra than that of color (lets say red) of the material (lets say glass) is being absorbed so more of red gets through and gets reflected (less of other spectra gets through and gets reflected) this is why glass looks transparent red and so does shadow.
Can there be a case where colored transparent material reflects one color but lets through some other (which would make shadow to be of different color than that of glass)?
 A: Yes There is. These kinds of filters are called interference filters, They reflect one or more parts of the spectrum/transmit the rest parts and they do not absorb light at all. For example consider this interference filter which transmits green light and reflects blue and red parts of visible light:

Red light and blue light is perceived by our brain as pink and so it looks pink, It transmits green light so it will have a "shadow" which is green.
Now consider this filter which lets in red and blue parts of visible light and reflects green part.

Now this filter has a pink "shadow" because it transmits red light and blue light which is perceived by our brain as pink, and it reflects green light so it looks green.
Filters are made out of normal glass, but they have optical coatings on them which are very thin and these coatings are what reflect some frequencies of light and transmit others. These optical coatings are made of metal like aluminium. What part of visible light is reflected is dependent on the metal you use for coating.
A: No. I think it can not because; The color of the glass comes from the
fact that the glass absorbs all six colors in white light except for the color
you see (the color of the glass). If the glass is blue, it absorbs all
colors but not the blue color - the blue keeps traveling
to your eyes, or into its "shadow".
