The young figs on my Black Mission are still mostly green but I have the tree in afternoon shade. The more sun the figs get, the darker many of the black figs turn, such as Violette de Bordeaux. Other black figs such as LSU Purple wait until they are getting ripe to turn black.
It's hard to find more than those two varieties in a selection of fig trees in the Los Angeles nurseries and chain stores. People think that's all there is, try the unripe figs in the stores, and choosed to dislike figs. But there are a lot of fig trees around since they grow wild here and are spread by the birds.