No. 029 — The Color of the Infusion
Tsuru Collection 鶴 · A Study of Tea
From almost transparent yellow to deep coppery red, the color of the infusion catches the eye before the tea even touches the lips. But what does it really tell us?
Observe your next cup before tasting it. Depending on the tea, the liquor may appear almost colorless, straw yellow, pale green, golden, amber, orange, coppery, or reddish brown. This color is not merely an aesthetic detail: it results from the raw material, the processing of the leaves, and what the water extracts during infusion.
Yet, it is tempting to rush. A dark cup is often assumed to be “strong.” A very pale infusion may seem light. A bright green sometimes appears fresher than a yellow-green. These associations are intuitive, but they are not reliable rules.
Color can tell us something about a tea. It cannot, on its own, judge it.
Where does the color of tea in the cup come from?
It all begins in the Camellia sinensis leaf. It contains a multitude of compounds: chlorophylls, carotenoids, flavonoids, catechins, and many other molecules. Tea processing alters part of this composition before the leaves even reach you.
In green tea, producers notably aim to limit the enzymatic oxidation of the leaves very early on. A large proportion of the initial catechins is thus preserved. The resulting liquor may display shades ranging from very pale yellow to yellow-green, depending on the cultivar, processing, harvest, and infusion conditions.
In black tea, on the contrary, enzymatic oxidation is deliberately taken much further during processing. Some of the catechins are converted into various oxidation products, including theaflavins and a much more complex set of compounds generally grouped under the name of thearubigins.
These transformations contribute to the yellow, orange, red, and coppery brown hues characteristic of many black tea infusions.
The color of the cup does not therefore come from a single “tea pigment.” It results from a set of compounds whose presence and proportions change with the leaf, the cultivar, and the way the tea was processed.
Oxidation Changes the Palette
This phenomenon relates to a concept already encountered in the Tsuru dedicated to the different colors of tea . But one distinction is essential.
When we talk about green, white, oolong, or black tea, the word “color” is often used to refer to a family of tea. This classification is based primarily on the methods used to process the leaves. It does not directly describe the exact color you will observe in the cup.
A green tea is therefore under no obligation to produce a distinctly green infusion. Some are pale yellow, yellow-green, or golden. Similarly, a black tea can produce a clear and luminous liquor rather than a very dark brown.
Two teas belonging to the same family can even display very different colors. The cultivar, terroir, harvest season, part of the plant used, and processing all play a role in the final result.
Then Water Enters the Scene
The leaf has prepared the palette. The infusion decides what goes into the cup.
Water temperature, steeping time, the amount of leaves, and the ratio of tea to water volume influence extraction. When these parameters change, the concentration of certain compounds in the liquor changes as well.
Thus, the same tea can produce two visually different cups without the leaves having changed. A short infusion may remain bright and relatively pale; a more thorough extraction can intensify the color.
However, this does not mean that the color increases in perfect parallel with everything we perceive on the palate. The molecules responsible for bitterness, astringency, umami, aroma, or color do not all change in the same way.
And What About Water Quality?
It can also alter the appearance. Its mineral composition, pH, and hardness play a role in the chemical interactions that occur during and after infusion. This is notably one of the reasons why the same tea prepared with two different waters does not always have exactly the same clarity, hue, or aromatic expression.
The color you observe is therefore the result of an encounter: a leaf, a processing method, water, and an infusion method.
Is a Dark Infusion Stronger?
This is probably the most common trap.
Our brains easily associate an intense color with an intense flavor. This association can sometimes correspond to our experience: a very prolonged infusion extracts more material and can simultaneously become darker, more bitter, or more astringent.
But it would be wrong to draw a universal rule from this.
A naturally very colorful tea can remain mild. Another, much paler, can develop remarkable aromatic intensity, a strong presence on the palate, or distinct astringency.
Color also does not provide a direct measure of the amount of caffeine present in the cup. Nor does it allow us to determine on its own whether a tea is “strong,” “premium,” or properly prepared.
The Tsuru Court
“The darker my tea, the better it is.”
Verdict: rejected. A beautiful color can contribute to the pleasure and provide clues about the preparation or processing. But no scale ranging from “pale = bad” to “dark = good” exists.
Clarity Matters as Much as Hue
When you learn to observe a tea, it is useful to look beyond the simple name of a color.
Is it clear or deep? Bright or slightly dull? Does the liquor appear bright? Transparent? Cloudy? Are particles simply suspended?
These observations enrich the tasting experience, but they must also be placed in context. Cloudiness does not automatically indicate a flaw, just as perfect clarity does not guarantee exceptional quality.
We have already encountered this phenomenon in the Logbook dedicated to tea that becomes cloudy as it cools . The appearance of a liquor can change after infusion: it is not fixed.
Learning to Look Before Tasting
Sight is the first natural step in a careful tasting. It prepares the mind, allows you to compare two preparations, and helps you remember a tea.
But a good tasting consists precisely in not letting this first impression decide everything else.
The nose can contradict the eyes. The palate can contradict the nose. A visually very light liquor can reveal an astonishing length; a cup spectacular in color can prove much more subdued aromatically.
It is this dialogue between the senses that makes tasting interesting.
To deepen this approach, you can return to Tsuru No. 014 Dedicated to Tasting Tea .
The Breath Ritual
During your next infusion, do not drink immediately.
Place the cup in front of a light source. Simply observe its color, clarity, and reflections. Formulate three words in your mind, then taste. Then ask yourself if what you had imagined while looking at the cup truly corresponds to what you feel on the palate.
What Color Can Really Tell Us
Used with caution, color becomes an excellent observation tool.
It allows you to compare two infusions of the same tea, observe the effect of a temperature change, track the evolution through successive infusions, or better understand certain consequences of processing the leaves.
It becomes less reliable as soon as we want it to tell us more: absolute quality, caffeine content, aromatic intensity, or the value of a tea cannot be deduced from a simple glance.
The color of the infusion is a trace of the tea's history and its preparation, never a report card.
A Cup Becomes a Map
Over time, you will recognize certain hues before even bringing the cup to your lips. Not because they allow you to guess with certainty what awaits you, but because they provide additional information.
Tea teaches us precisely to be wary of shortcuts. A black leaf can produce a luminous liquor. A pale liquor can have a lot of character. A deep color can accompany an unexpected sweetness.
So look at your tea. But always let the aroma, texture, flavor, and length finish the story.
Tsuru Collection 鶴 · Cap sur le Thé
A Study of Tea, One Cup at a Time.
Article written by the Cap sur le Thé crew — discover our story.
