A fresh cup looks pale, then the tea left in the pot is darker when you return. It is tempting to blame the bag. First, notice when the color changed: during brewing, or after the finished tea had been standing?
ITO EN explains that brewed green tea can turn brown as its catechins react with oxygen. A color change after standing is not the same question as tea that was brown from the first pour.
Was it brown straight away?
Read the tea's name and ingredients. Hojicha is roasted green tea, so a brown-toned brew is part of what you are buying. A cup does not have to match the bright green powder shown in a matcha photograph.
Also look at the cup itself. For a useful comparison, pour a little into a plain white cup rather than judging it through tinted glass or against a dark glaze.
| What you notice | What to check |
|---|---|
| Brown from the first pour | Tea type, ingredient list and brewing recipe |
| Darker after standing | Oxidation can change the brewed tea's color |
| Different with another water supply | Compare the water while keeping the recipe the same |
| Harsh taste as well as dark color | Check the leaf amount, temperature and steeping time |
A small comparison you can make
Prepare the tea as directed and strain it fully. Look at a small serving straight away, then compare it with the tea left in the pot later. Use the same cup and light. This is a way to notice a change, not a test of antioxidants or freshness.
If the fresh serving already tastes unpleasant, work through the bitter tea checklist. When the main difference is your water supply, the tap, filtered and bottled water comparison gives you a more useful next step than judging by color alone.
Does brown mean unsafe?
Color cannot answer that on its own. The oxidation explanation is not a reason to keep brewed tea indefinitely. Make an amount you plan to drink, keep equipment clean and follow any storage instructions for the product. A photograph of the cup cannot tell you how it has been handled.
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