Blue British passports will be issued from next month.
The current burgundy design is being replaced in March as a way to mark the UK's departure from the European Union.
The contract to produce the passports was controversially awarded to French firm Thales, but the documents will continue to be personalised with the holder's details in the UK.
Home Office officials said the passports will be the 'greenest British passports ever'.
The carbon footprint will be offset through projects like planting trees.
The floral emblems of England, Northern Ireland, Scotland and Wales will be embossed on the back of the passports.
'Personal data' will be kept secure in the passports through 'innovative technologies embedded in the document', according to the Home Office.
The passports will be 'harder to forge' due to the secure printing and design techniques.
Blue was the colour first used for British passport covers in 1921.
The colour changed to burgundy in 1988 as a way to standardise passports across the European Union.
People will still be able to use their burgundy passports for travel until they expire.
Home Secretary Priti Patel said: "Leaving the European Union gave us a unique opportunity to restore our national identity and forge a new path in the world.
"By returning to the iconic blue and gold design, the British passport will once again be entwined with our national identity and I cannot wait to travel on one."
