Ficus carica is a common fruit, which usually presents a dark purple or brown color when ripe. Blue figs are usually immature, but they can be ripened to a certain extent.
There are several ways to ripen figs. The simplest way is to put them at room temperature and wait for them to become soft and sweet. This may take several days or more, depending on the maturity and storage conditions of the figs.
Another method is to put green figs in paper bags or plastic bags, and add some mature fruits, such as apples or bananas. These ripe fruits will release ethylene gas to promote the ripening process of figs.
Whichever method is used, ripe figs should be stored at room temperature and their maturity checked regularly. Once figs become soft and sweet, they can be eaten.
It should be noted that ripe figs may rot or deteriorate, so be careful when storing and eating them. If figs show signs of deterioration, such as black spots or mildew, they should be thrown away immediately.