Camellia sinensis · purple-leaf selections
Depends on processing
“Seventh family” contradicts ISO categories
Purple-leaf tea plants can be rich in anthocyanins; their leaves may be processed into existing tea families. ISO does not list purple tea as a seventh primary type.
What the name describes
'Purple tea' is commonly used for products made using tea plants with purple pigmentation in their young leaves. Kenya's Tea Research Foundation discussed a purple-leaf clone called TRFK 306/1 as an anthocyanin-rich material. That is evidence of plant-selection and pigmentation research, not proof that the six-family tea classification needs a seventh entry.
Why processing is a different dimension
ISO 20715:2023 groups true teas as black, green, white, oolong, dark and yellow, based on processing. Purple-leaf material can be manufactured in more than one style. A colour descriptor, leaf genotype, geographical origin, drink recipe and processing classification answer different questions.
What anthocyanins do—and do not—establish
Anthocyanins are naturally occurring pigments associated with the purple appearance. Their presence does not automatically prove a health outcome, a superior antioxidant benefit in human consumption, or an exact concentration in a particular brew. Evidence about specific clones or extracts cannot be transferred automatically to every retail product labelled 'purple tea'.
How ONGTEH classifies it
Record the plant as Camellia sinensis, the purple-leaf characteristic when supported, and the actual green/black/other processing style where known. Describe origin separately and avoid listing 'purple' as a seventh standardized processing family. If a producer does not disclose the processing category, mark it as unverified instead of guessing from leaf colour.
Sources and verification
These references support the statements above. An official standard defines categories; a clinical paper measures a sample; a cultural record documents practice. Each source has a different scope. The publisher has not tested commercial products independently.
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How to cite this reference
OngTeh Editorial Team (2026). Purple tea: leaf pigmentation is not a seventh tea family. OngTeh. https://ongteh.com/reference-purple-tea-classification.html
This article is educational, not individualized medical advice, product certification or a substitute for specialist review. Corrections and research limitations are described in our editorial standards.