Am I right in thinking the first two rays of the dorsal fin are often longer and more pronounced in males and this can be a way of sexing younger Rams.
I Haven't any at the moment but recall that was how they were sexed at the LFS when I bought mine. At the time they couldn't guarantee it but it proved to be correct when they developed and the pink bellies showed through.
As for yours I would err towards male, espec if jeuvenile and waiting for full colouration to show.
Pretty fish either way, I love the blues on these fish.....