Before anybody decides to install a "darker" colored headliner, check with forum member "Beaner".
He installed a black headliner in his Cedar/Slate interior, (and since I have a Cedar/Slate in mine) he had me get inside his car to see how it now feels like it's closing in on you.
I had to admit, I never feel claustrophobic in our Crossfire, but it sure felt "close" inside his.
Of course maybe it's just because his engine compartment is "overstuffed".