bromeliads are ok. I don''t use them but have seen them is some enclosures for color. The thing is, the big flower in the middle only lasts for so long and then dies.
What kind of growth light are you using? Thinking of setting one up myself, I'd suggest hibiscus also, its great vitamin C for chameleons, also sturdy so they can climb medium leaves and pretty flowers.
I would look into an Arcadia Light.... It may not be what u want to spend , but u'll definitley get mor color out of ur cam, and also, u'd be helping ur Plants.
I have a pothos plant that I hang from the ceiling in mine. He loves it, theres vines that hang down off of it and at night he will sleep under the leaves of it. Also drips water very well and doesn't need much light I have a standard reptiglo 5.0 UVB bulb and it grows fine.