There are only FOUR passport colours in the world and each one means something different
At the last count, 42.5million of the UK's population of 64.1 million hold a passport.
Whether foreign or British, these passports will adhere to one of just four colours.
You've probably noticed how passports don't come in a rainbow of different hues and shades. They tend to be quite unadventurous in colour.
As for the small selection, there's a reason for each one.
Here's what each colour is - and what each one means.
1. Red
As any Brit knows, when it comes to UK passports, deep red is the colour of choice.
It also happens to be the most common passport colour with all members of the European Union, apart from Croatia, sporting a burgundy hue.
The Economist called this a "branding exercise" - though there's no word on whether we'll stay a nice shade of EU re...