Rear Window Tint Reddish Color

Rear Window Tint Reddish Color

Has anyone who has tinted their windows noticed their rear window ending up having a reddish hue? A fellow Model S owner kindly met me last night to show me his results using the 3M crystalline tint. The car looked awesome but the rear window had a rose colored hue to it unlike the other windows.

Is this due to the 3M crystalline or would any tint have the same result?

Darmok | March 13, 2013

I used Formula One ceramic tint and it is most certainly grey.