hey everyone was wondering what i could use to have my chameleon change colour. or do they do it on there own over time so far i got yellow brown green could i put something in the cage to make him adapt to the colour?
As he grows up he will get more colourful as his adult patterns come in. His colour range is determined mostly by genetics though, he doesn't change to suit his surroundings, more to show his mood and to thermoregulate.
So you can't teach him new colours, sorry
Here is a great all-round caresheet you might not have seen - I recommend it to everyone with Veileds - https://www.chameleonforums.com/blogs/chameleonsinmyhouse/395-veiled-chameleon-care-sheet.html