A beer coloured blue using the seaweed spirulina was presented at the Anhalt University of Applied Sciences in Kothen on Thursday.

Ruptly had the chance to follow the production process, where the seaweed spirulina was added to a light coloured beer to achieve the blue colour of the beverage, which has been named 'Real Ocean Blue.'

While green beer has become more common on occasions like St Patricks day, blue beer is much more of a rarity. In order to achieve the colour, food technologist Jean Titze and his team extract the chlorophyl from the seaweed, leaving behind just the phycocyanin responsible for the blue colour, before adding it to the beer.

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