Concerning urate colour...

[camille]

I have NEVER seen my veiled chameleon drink. I mist her enclosure three or four times a day... I get the humidity up and give her plants a good misting... I have tried misting her directly, but she seems to hate the feel of the water - yes, I have tried using cold, warm, and hot water.

Having said that... her urates are sometimes all white, but for the most part contain a little yellow. (i.e. a one inch urate may be 1/8 yellow).

Do I have reason for concern?

 

[jojackson]

Not really, your cham is getting water without you seeing, otherwise it would show more yellow, sunken eyes etc.
Urate is rarely perfectly white. If you dont already, install a dripper in your cage to provide ample opportunity for water, your animal will benefit.