Thanks for the replies so far, I'm sure that they were either black OR dark blue, one has always had a job differentiating when the shades are close, though it does give one an opportunity to ask strangers (female) in shops what colour something is
Maybe Lord Chuffington-Smythe does have the right to a special passport, it wouldn't shock me with all the perks that they get for snoozing on the back benches
The person that told me, 10 years ago seemed to indicate that through certain well placed lawyers it was possible ? As for my fellow passengers, the passports to my eyes were black/very dark blue and slightly bigger than the standard EU passport if that helps.
SHJ