The science behind our colour changing blue tea!

The science behind our colour changing blue tea!

What is colour changing tea?

Our colour changing tea is made from blue tea, or butterfly pea flower tea, which is used to colour foods vivid blue. The flowers of the plant are the brightest blue to exist in nature and when brewed in hot water (or cold!) they produce a bright blue liquid.


Not only is the tea blue, but it changes colour depending on the pH levels of the ingredients it is mixed with. Bird & Blend have a butterfly pea flower tea blend - Blue Raspberry - which is a blend of blue pea flowers, green tea leaves and freshly dried raspberries, which bring a slightly sweeter, fruity taste to the blue tea.


Why does blue tea change colour?

Naturally blue tea brews into a bright blue colour but when other ingredients are added to it, it can magically change colour before your very eyes! This is because the additional ingredients change the PH balance of the blue tea, causing a colour change.


For example, when you add acidic lemon juice to blue tea it will change from blue to pink within a matter of moments; try it- it's a lot of fun and tastes great too! Adding hibiscus leaves or syrup will result in a bright red colour, making this tea the perfect party trick!

Blue Raspberry Recipes Check out our favourite Blue Raspberry Recipes... Learn how to make Unicorn Fizz and Blue Raspberry Frappés! Show me more

Visit our online tea shop to explore more hand-blended teas and other tea accessories. 

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