This photo shows how the green has been extended across the background, and blended in (see previous photo). More importantly, it also shows how green has been added to the chameleon itself in a few places. This helps tie the background and subject together, unifying the elements in the painting.
If the elements of a painting aren't sitting together comfortably, it's worth checking whether you've used the colors in your palette across the whole painting, or in various separate areas. If it's the latter, sometimes painting a glaze across the whole painting (using a color that's in the painting) helps.
