Hi Rover,
The light color could be due to any of those reasons. However, if she were sick, there would likely be
other symptoms as well. You can learn about what to look for in the
Chameleon Health and other topics in the
Resources section.
She probably
is scared.

Chameleons rate pretty low on the food chain. Aside from the insects they eat, most everything else in their natural world wants to EAT them, and that's usually how new chameleons view us—as giant predators who want to
EAT them!
Most reptiles go through what's called 'relocation stress' which usually lasts for 1 to a few days (In some cases it can go longer). You can help her through it by leaving her alone (provide for her needs, but respect her space & privacy) as much as possible during this period—allowing her to get used to her new world (and you

). When you are in her vicinity, move
slowly...
More foliage for her to hide in can also help attenuate stress.
With a female veiled, live plants are about as close to 'required' as you can get (along with a lay bin)!
The impaction risk has been mentioned, and I agree.
IME, this is one of the best times of year for getting plants from a garden store; it's the end of the season, so they want to clear out as much as possible for next season. I've gotten the best deals this time of year. Possible sources include:
Home Despot
Lowes
Wally-Mart
Grocery stores
Garden stores
Nurseries
Family (relatives), friends, neighbors
As others have mentioned, egg laying isn't an option—it's a fact. If she is not set up with a proper lay bin, she could become egg bound.
https://www.petmd.com/reptile/conditions/reproductive/c_rp_dystocia
I
think folks were asking the
types of thermometer and hygrometer, i.e. analog/dial vs. digital.
View attachment 314043vs._____ View attachment 314044
Analog/dial-type meters are notoriously inaccurate and
can be as much as 40°/40% off.
Digital meters
with probes are usually accurate to within ±2°/2%. They are inexpensive, as are combo. units, such as:
https://www.amazon.com/gp/product/B08Y6CYVT9/ref=ppx_od_dt_b_asin_title_s01?ie=UTF8&psc=1
Optional, depending on how much and how often you mist, and whether the chameleon uses or ignores it. They're all different.
Mountain Dragon already mentioned the
Enclosure Threads (3) at the top of this forum, and
MissSkittles mentioned attaching branches, vines, & plants. Here are some more ideas for branch & plant support. Some require anchoring to the frame—others do not.