Only the very old ones were blue - only people born before ~1970 (54 years old) would have ever used one as an adult, though people in their late 30s or 40s may have seen someone else using one as recently as 25-30 years ago.
For the majority of Britons, a traditional British passport is burgundy, like it’s always been, and the blue ones are new “special racist passports”.
[Edit] in answer to the original question, one of the terms of Brexit was “we get our old passport colour back”. The mere idea got Daily Mail and Daily Express readers frothing at the cock.
Only the very old ones were blue - only people born before ~1970 (54 years old) would have ever used one as an adult, though people in their late 30s or 40s may have seen someone else using one as recently as 25-30 years ago.
For the majority of Britons, a traditional British passport is burgundy, like it’s always been, and the blue ones are new “special racist passports”.
[Edit] in answer to the original question, one of the terms of Brexit was “we get our old passport colour back”. The mere idea got Daily Mail and Daily Express readers frothing at the cock.