While all matcha will be some shade of vibrant green color, the color actually tells you a lot about this green tea powder. A good rule of thumb is, the deepest shade of green is high quality matcha powder. Another best practice is to smell it, even at a higher quality, if the matcha smells off then it’s likely gone bad. Culinary grade – Lightest color matcha, which is typically used in baking or making smoothies. Premium grade – Mid color and slightly more potent than ceremonial grade. Ceremonial grade – Deepest color and the highest quality. Meant only for drinking.