Ficus concinna is one of the figs that has the reddest new leaves as well as being an excellent material for bonsai.

The following shot shows the tree, grown from seed, in old and then new foliage. The new foliate sprouts out red and gradually turns green over the next 1-3 weeks. There are other Ficus species that can have new red leaves but concinna seems to have individuals that can show very red or bronze new leaves.

Tree on the left with old leaves and new leaves showing quite red on the right.