If it's really yellow, it might be some sort of cobalt. However, the pic does look like an Olemarie or Oyapok. However, the nice blue netting on the legs is really cool. I'd check with wherever you got them to find out what they are. Size and age should help us tell what they really are, and I'm by no means an expert on the tinc. morphs. You might want to check out www.fantasticfrogs.com and check their frog pics to compare. A google image search for tinctorius morph would probably help as well.
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Homer W. Faucett III, esq.
Purveyor of Trivialities and Fine Nonsense