Mine were semi transparent when I first received them, about 2 weeks later they were pale yellow. About a month after that they have been the same deep yellow they have been for the past 9 months I’ve had them.They are not as solid yellow but more a pale yellow for a while. After 3 months or so they gain pretty dark yellow.
I’m not sure what many are concerned about in this thread about captive bred. There are zero differences from the last year or two Biota bred and the true wild Hawaiian - I know early batches had lots of HLLE issues but mine have zero and neither do people I know that purchased around the same time or later as I did.