Rosy Barbs male or female?

[baker27marine]

These 4 barbs. 2 have black fins on top and bottom of the body and 2 only have black fins on the top. Which are male and which female? There isnt a difference body color.

[cossie]

he female Rosy barb is silver coloured with a red tinge, and the male Rosy barb will change from silver to rich claret flush during the breeding period.
Also the females tend to grow larger than males