Before cannabinoid testing and genetic profiling of the cannabis plant, consumers would judge a batch of weed based on its smell, taste, and color.

In fact, a whopping 93 percent of buyers make a purchasing choice contingent on the color and look of the bud.

The color of cannabis is not constant, but rather changes with the plant's maturity. According to the pH or acidity levels of the plant, its anthocyanins—water-soluble pigments—may appear blue, red, or purple.

Anthocyanins appear in other plants as well, such as blueberries and eggplants.

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Madison Margolin ~ Motherboard.Vice.com ~

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