Agree. Your chameleon is likely not getting enough water.
Unless your animal is quite old - Its been my experience that very very old chameleons (likely due to organs not working well anymore) will often, even if well hydrated, have a tiny tip of orange/yellow to one end of the white urate. If your chameleon is on the upper end of a panther female's life expectancy, like over 4 years old (6 for a male), this may be applicable.