Always brownish color on my female?

[jarvis1]

guys can you help me? I came back home and my veiled girl was on the ground behind the plant vase, I caught her to be in that spot time few weeks ago too. she had a very dark color when she were behind the vase. and I don't know whats wrong, I dont know is she's exploring, if shes gravid, or if shes ill. this morning she ate regularly crickets with calcium.
she keeps eating and moving and pooping regularly but she has this dark color, this time was quite dark but usually she still has a brownish color instead of a good green.
temps at 86 in basking spot, at 75 in the lowest spot of the terrarium.
Misting 2 times a day.
eating crickets with calcium everyday and calcium+d3 three times a month, vitamins 2 times a month.
linear t5 uvb 12 arcadia.
under here few pics with her actual skin color and a pic of 1-2months ago where she still were quite green. is this just stress or something else?

 

[Syreptyon]

Chameleons regularly go through periods of dullness. It can be seasonal, because of an upcoming shed, or for no clear reason at all. Her color does not look concerning to me, but the time she's spent on the bottom of the cage is. Do you have a laybin set up for her?

 

[jarvis1]

I used to have it in her cage months ago but since she was not showing any interest in it and she wasn't digging anywhere I decided to remove it. anyhow there's substrate in my enclosure but I didn't notice her digging at all, the only thing she does is to go down, walk a lil bit for few seconds and then going back on the branches. Now, I don't know for how long she was behind the vase 'cause I was just came back home, It could just be a coincidence and she was just walking behind the vase. since my enclosure is not so big for a proper lay bin I wanna make sure of her gravid state before to occupy half of her enclosure with a bin.
Does she look gravid to you? I mean I know the sings but I really can't see any of them, she eats, poops, she's not fat because of eggs and the colors she's showing are just dark green and brown. no blue and orange spots..
Could it be because of the UVB bulb? Do I need to change it? it's been 7 months since I bought it.