Mangos or Mangoes, when shipped to the market are quite often unripe with a green color, or green with a reddish blush. A ripe mango loses its green color and becomes yellowish as shown in the photo at the left.
We have found that mangos purchased with no yellowish color often begin to rot before they become fully ripe. We try to buy the ones showing the most yellow. We then store them on our counter top with bananas, which seem to help ripen the mangos.
When ripe, the mango will become slightly soft, and the skin will often begin to show a slight wrinkling. It will also have a slight tropical resin odor. Once you become familiar with these subtleties, you will begin to enjoy this delicious fruit even more.