'68 is pearl, I just sold one with original material and posted pics last fall when I scrubbed them clean. The front seats had lost the pearl on the wear areas, but the sides were still pearl as were the door panels and rear seat and side panels.

I have a set of '69 seats which are White, there is no pearl to them (unless it's not visible with the dirt that's on them!). They'll be out of the car in the next few days as my dad begins disassembly of his car.

I can't confirm '67 upholstery.