Ideally, you will want to look out for an unripe avocado that isn't too firm or too soft. Unripe avocados are difficult to cut into so it's best to go for one that has just started to give when gently pressed. If you're planning to freeze ripe avocados, remember that they should be soft but not mushy. Ripe avocados are usually dark green in color. If you spot an avocado that is pale green, it's just not ripe yet, and if it's bright green, chances are, the fruit was picked before it was ready to be eaten. It can still taste okay but it is best to use it in baked goods.