i dont know for sure but i belive that brown is not really a desired color to see in a male veiled cham, i could be wrong but a healthy cham should be light green with various markings of color. i would fill out the how to ask for help form and post some pics.
https://www.chameleonforums.com/how-ask-help-66/
Your Chameleon - Veiled chameleon,male,approximatly 4 months old,I have had him for 3 weeks.
Handling -10 minutes to feed and to move to a free range tree.
Feeding -crickets,dubias,wax worms, and have silkies and flys on order, he eats 8 to 10 roaches daily, cal with d3 twice a month, dusted with no d3 calcium daily, and vitemans 2 times a month.
How are you gut loading-putting apples, carrots, lettuce, and broccli into feeders cage (havent had any other greens yet and then putting the feeders into a bowl with gut load for about 2 hours before feeding.
Supplements - Rep cal no d3 everyfeeding, dust twice a month with rep cal with d3 and dust with vitemans 2 times a month.
Watering - spray 3 to 4 times daily with spray bottle for about 3 minuntes.
Fecal Description - white tip with with moist black dropping connected.
Has this chameleon ever been tested for parasites(no thinking anout taking him to the vet for a check up)
History - Came from a plant store which seemed to have other healthy chameleons they werent dusting crickets

, they kept him with other chameleons and fed them 30 crickets.( there was more then three babies, probably should have fed a little more IMO)
Cage Info:
Cage Type - 2x2x4 aluminum mesh, home made
Lighting - repti sun 5.0 and 150 watt basking light 6" away from cage its self and a few more inches away from his basking branch, lights on 6am lights of 6pm.
Temperature - I have a heat gun and 85 degrees and at night about 75
Humidity -50% and 60% after misting, misting with a spray bottle, humidity thermometar middle of the cage.
Plants - Braided ficus, planting a rubber tree tonight, and geting foilage from the dollar store as well.
Placement -Near a fan which i keep off just for him LOL no air vents and it is in my room and im the only one who goes in. the cage is 4ft away from the floor.
Location -Arizona
Current Problem -he is light brown alot, unless he is asleep he is lime green, no really pattern. He is starting to get some green dots all over, could this be him getting older and growing into his green?