These have been introduced since 1988. It was done to conform with EU rules.
Note that they are British Passports, not English,.
navy blue, indigo, blue
We speak English in Australia. The colour blue is pronounced "blue" as in all English speaking countries.
acid=change the colour of litmas paper to blue into red base=change the colour of litmas paperto red into blue
You can't.
I think it will change into red.
That wording isn't very good. change the colour of what? If your talking about Blue Tongue Lizards, they connot change colour but it may change slightly as they get older. (like any animals would)
The colour is red in acidic solutions.
Blue.
Blue
yes yes it can
blue
respiration