Hi
Ebony's green and golden bell frogs Mork and Mindy are really green yet my three have these colourations:

Camo: Bright Gold with brown spots on side of chest only green is a stripe under both eyes.

Jabba: Bright gold with brown spots on side of chest and very dark green all over back.

Tim Tam: Very dark brown with pale brown spots on side of chest only green is a stripe under both eyes.

I want mine to be a bit greener is there any way I can change it?
If I put more plants in the enclosure will they be greener?
Thanks