Why are the leaves of some plants not green in colour?

Colorful leaves we get to see because of different types of pigments present in the leaves. There are basically three primary pigments. High concentration of Chlorophyll in leaves gives it the green color, Carotenoids gives yellow or yellow-orange and Anthocyanins gives red or purple color to leaves.  Leaves of other colors also contain chlorophyll are hidden under the non-green pigments so they can prepare their foods.

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