How to match Atrium window tint?

[Larrygmoody]

So... I busted out an Atrium window

I have the window removed, and I'd like to replace the glass with Lexan or Plexiglass, but how do I make sure the tint will match? I've read that regular window tint does not work well on plastic, so I can't 'experiment' until I get it right...

Thanks for any suggestions!

My rig is the same as the one in the attached image.