Tonguez
A suffusion of yellow
It may be just me but I find that Chromatics seem better suited to their Habitats than the metallics are. The idea of a Black dragon lurking in the swamp, the waters turning acidic as it corrupts the area works for me, same as a grinning Green hiding in the forest undergrowth, stalking their pray or the fiery Red blasting down from the mountain like a pyroclastic flow.I find the fact people seem to make dull good depressing, most of evil is the banalest stuff possible.
I dont get the same feeling for metallics, at least gem dragons have a few quirks to differentiate them