Why Is Good Matcha So Bright Green?

If you have ever held a tin of high quality matcha next to a cheaper product, the colour difference is immediately striking. Good matcha is an almost electric jade-green. Lower quality or old matcha is a muted, yellowish, or brownish-green. This colour difference is not cosmetic. It reflects genuine differences in the compounds present in the powder and tells you something important about the quality, freshness, and production of what you are buying.

The role of chlorophyll

The vivid green colour in matcha comes primarily from chlorophyll, the pigment that plants use to capture light energy for photosynthesis. In a shade-grown tea plant, the shading condition, blocking most of the direct sunlight for three to four weeks before harvest, creates a stress response in the plant. The plant ramps up chlorophyll production in an attempt to capture whatever light is available, resulting in leaves with dramatically higher chlorophyll concentrations than leaves grown in full sun. More chlorophyll means a more vivid, intense green colour in the finished powder.

What causes dullness

Chlorophyll is relatively unstable and degrades in the presence of heat, light, oxygen, and acid. When matcha ages, the chlorophyll molecules break down into pheophytin and other compounds that are olive or brownish in colour rather than vivid green. This is why old or oxidised matcha looks dull. Heat, whether from improper storage near a stove or from the sun shining on an unsealed container, accelerates this degradation significantly. Exposure to oxygen does the same thing, which is why airtight storage is so important.

Lower grades and colour

Lower grade matcha is typically made from older, later-harvest leaves that were shaded for less time or not at all. These leaves have lower chlorophyll content to begin with, so the powder is inherently less vivid even when fresh. Culinary grade matcha is appropriately less green than a premium ceremonial grade, and this is expected. However, even culinary grade should still be clearly green, not yellow or brown. A culinary grade powder that looks brown was probably either very low quality, very old, or improperly stored.

Using colour as a buying guide

When purchasing matcha, the colour of the powder is the most immediately useful quality signal available to you before tasting. In person, you can open the tin and look directly. Online, examine product photos carefully in what appears to be natural or neutral light, and avoid listings where the powder is not clearly visible or where the photos look heavily filtered. A seller who is proud of their product will show you the powder clearly.

Common questions

Can colour be faked with food colouring?  It is possible but unusual. A combined check of colour, texture, smell, and price together is much harder to fake than colour alone.

My matcha is not as green as I expected. Is it bad?  Check when you bought it and how you have stored it. Exposure to light, heat, or air accelerates colour loss. If the smell is also flat or hay-like, the powder has degraded significantly.

Does greener mean higher quality?  Generally yes, within the same type of product. The most vivid ceremonial grades have the most intense colour. However, comparing a premium culinary grade to a standard ceremonial grade is not a direct comparison.

For a clear illustration of what quality matcha colour looks like in practice, the matcha quality guide provides further reference on what distinguishes premium from ordinary powder.