Mixing "Grey Leg" "Blue leg" vents?

[TheDoc]

I look forward to seeing is progress to find the "answer".

Thanks for your interest in my topic, and all the info you folks have shared.

[LME7132]

When I was breeding vents I used to think of the blue legs as more of a juvenile trait. With the first frog I bought it seemed like the blue color faded as they go older. Then when I had a couple broods they came out of the water with nice blue legs. I only had one pair so I can't speak much to the commonality. Anyone else seen something similar?