She's a cutie! Seems like a definite possibility! Hard to say 100% without seeing the parents and knowing where they came from. I'd believe the breeder's word. Maybe email him or something to see pictures of the parents and get some more info if you can?
That is a Tangerine Bell Hypo, not a complete super hypo which makes a sunglow. The lavender on the back will fill in more orange as it gets bigger. You can tell it is from a Bell sunglow project so you are not being mislead.