Colour: While buying mangoes, remember to look at the colour of the mangoes. Whenever a mango is ripe with chemicals, it will have green spots, and one can identify them. In addition to this, if a mango has bluish marks on it, you should avoid buying a pizza. Naturally ripened mangoes have brown spots, while chemically ripened mangoes have pale or white spots. Learn how mangoes ripen by observing the colour of the sites