Why are blueberries called blueberry if they are purple?
Blueberries are called blueberries because they are observably blue. The real color of blueberry is deep purple with reddish-purple juice inside even if it appears blue in color. There is no blue color pigment in blueberries but it contains a pigment called anthocyanin that gives a unique purple color to blueberries. Technically speaking, blueberries are red or purple but for a common man blueberry is blue.
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