From what I've seen this species seems difficult to sex ventrally but figured I would give it a go. I've tried looking though the pictures and I really cant say I feel any sort of confidence in my ability with these lol
@spodermin C. versicolor females at this size have really noticeable slits. There slits are rather large, if you see the majority of them, you will see a huge difference. Males can have spaced out booklungs, but with no slit (as you can see in this photo). My male has a ventral almost identical to this one for my preference.