Hi
Hi jeanie
Welcome to the chameleonforums, Panthers are far more capable of colour change than veilds.This is due to the migration of melenin from deeper within the skin migrating to nearer the surface, its a complecated process that involves melanophores & chromatophores.
Panthers depending on were they come from in madagascar ie ambilobe,ambanja,sambava, tamataves etc etc can be anyone of countless colour combinations. This is probably true of the veild cham but to a lesser degree and is probably due to inter-breeding.
The reason your cham is dark in the mornings is whats called thermoregulation it basically means your cham needs to warm up to be able to feed & digest food he therefore goes lighter when he has reached his desired temp.
As brad stated your temps could do with being a bit lower say 95-100f under basking light and around 80f ambient temp. Also get rid of the waterfull they cause bacteria which will give your chameleon respiratory issues.
Safe plants include fiscus, pothos, umbrella
cage & humidity ok
He does seem to be eating alot but like brad stated hes only 6 months old so he is still growing maybe the crickets are to small, veilds grow alot faster than panthers and reach sexual maturity at the age he is now.
Good luck with him and if you have anymore questions fire away