Why Is Blue Tea Blue? The Science Behind Its Natural Colour

Why Is Blue Tea Blue? The Science Behind Its Natural Colour

What Makes Blue Tea Blue?

Have you ever wondered why a cup of Blue Tea has such a beautiful, vibrant colour?

The answer comes from the butterfly pea flower, also known as Clitoria ternatea. Unlike traditional tea leaves, Blue Tea is made from the flowers of this plant.

The naturally blue colour comes from plant pigments called anthocyanins, particularly a group of pigments known as ternatins.

The Natural Colour of Butterfly Pea Flowers

Butterfly pea flowers are naturally rich in anthocyanins.

These water-soluble plant pigments are responsible for many of the red, purple, and blue colours found naturally in flowers and fruits. In butterfly pea flowers, their particular anthocyanin composition contributes to the flower's distinctive blue colour.

When the dried flowers are steeped in water, these pigments move into the infusion, creating the beautiful blue colour associated with Blue Tea.

That's what makes the colour so fascinating — it comes naturally from the flower itself.

Why Does Blue Tea Turn Purple With Lemon?

This is one of the most interesting things about Blue Tea.

When you add lemon juice, the acidity of the drink changes its pH. Anthocyanins are sensitive to pH, so their molecular structure changes as the environment becomes more acidic.

As a result, the colour can shift from blue toward purple or violet.

So the colour change isn't artificial or a trick — it is a natural response of the flower's pigments to acidity.

Blue Tea + Lemon = A Natural Colour Change

Blue → Purple/Violet

The exact shade can vary depending on factors such as the amount of lemon, concentration of the infusion, water chemistry, and pH.

Why Is This Different From Traditional Tea?

Traditional tea is made from the leaves of Camellia sinensis.

Blue Tea, on the other hand, is a herbal flower infusion made from butterfly pea flowers.

This difference gives Blue Tea its:

  • Naturally vibrant colour
  • Floral character
  • Unique brewing experience
  • Naturally caffeine-free nature when made from pure butterfly pea flowers
  • Beautiful colour-changing effect when acidic ingredients are added

What Makes Himora Blue Tea Special?

Himora Blue Tea uses whole butterfly pea flowers, allowing you to see the botanical ingredient while it brews.

The whole flowers create a simple and visually beautiful tea ritual — from adding the flowers to watching the colour develop in your cup.

You can enjoy it hot or cold, depending on your preference.

How to Brew Himora Blue Tea

Hot Brew

  • Use 6–8 whole flowers.
  • Add 200–250 ml of water.
  • Use water at around 90–95°C.
  • Steep for 5–10 minutes.
  • Strain and enjoy.
  • Add lemon if you want to experience the natural colour change.

Cold Brew

  • Use 10–12 whole flowers.
  • Add 500 ml of cold filtered water.
  • Refrigerate for 8–12 hours.
  • Strain and serve chilled over ice.

More Than Just a Beautiful Colour

Blue Tea is not simply popular because it looks beautiful.

Its colour tells a fascinating botanical story. Butterfly pea flowers contain anthocyanins that respond to changes in pH, giving the tea its distinctive colour-changing character.

This makes every cup a little more interesting — especially when you experiment with lemon.

Final Thoughts

So, why is Blue Tea blue?

Because butterfly pea flowers naturally contain blue-producing anthocyanin pigments.

When you brew Himora Blue Tea, you get to experience these natural pigments in your cup — and with a little lemon, you can watch the colour shift naturally from blue toward purple.

Naturally blue. Naturally fascinating. Pure Himora.

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