My first thought when I first started reading this thread was "Is it a female?"
I don't have an adult female hypo lavender, but I do have a yearling and so does Chuck. Both girls hatched out and have remained quite darker than the male in the same clutch. The father (hypo lav) is also very light.
My first impression of that snake is hypo lav due to the quality of the coloration, especially the faint hue of orange I see in the picture. Something about the head coloration also makes me think hypo lav.
The female hypo lavs I've seen have been quite a bit darker than the males. The other thing I see in my hypo lavs, at least, (which have come from Rich Z stock as well) is that they maintain more of that orangey hue to them, longer, than regular lavenders. It's hard to describe, but the quality of that tone is different to my eyes.
I'll try to get some photos tonight of the yearlings comparing male vs. female.
I wish I had an adult female hypo lav right now, but I don't.

Soon, lol. My female 2004 is already up to 75 grams.
I've got a head photo comparing adult male lav to adult male hypo lav that I'll try to dig up as well. Perhaps I can get some comparisons between the lavender male and hypo lav male tonight, also.
It would not surprise me at all if that snake IS a female hypo lavender.