Hi Thomas,
Not 100% sure but it looks like you could possibly have two males as the colour goes to the end of the dorsal fin on noth of them.
Here is some info I found on sexing Kribs:
The males are somewhat longer and thinner (3-4") than the females (2.5-3.5"), which are more rotund with a purple/red coloring around the belly. The male may also sport a coloring, usually less radiant than the female's, however, if healthy and happy, the male can be just as colorful as the female.
Dorsal Fin: The male Kribensis will have a pointed dorsal fin with color extending to the tip. The female will have a rounded dorsal fin, almost always with NO color extending to the tip. It is not uncommon to see one or two black spots at the end of the dorsal on the female and male.
Caudal Fin: The male has a pointed (diamond shaped) caudal fin, possibly with one or more black spots or 'eyes' on the top segment closest to the fleshy part of the fin. The female has, once again, a more rounded caudal fin.
Pelvic and Ventral Fin: The male has thinner, more sickle shaped ventral fins (think of an angel Pterophyllum Scalare), while the female's ventral fins are more rounded and paddle-like, with a little more color on the pelvic fins and pelvic region.
Below is a pic of my Kribs - the male is the top one.
Hope this helps, Eddie