I wouldnt say it is "no doubt" two females. The darker one in the background is for sure a female, however the one in the foreground may be a male. It does have some iridescent blue on the lower gill and jaw but it is not enough to say for sure if its a female. Id call it a male if i had to take a guess.
+1 i think a few more pics of that one on the left im sticking with female though.. the new female i just took in looks just like that one and is female
Males can sometimes have a little bit of blue dotting on the gill plate. One of my males has a whole array of blue dots there. The spangling on the body says male to me but to be sure, you should vent them.