Doing some late-night thinking here. Dev's take on the possible unmasked color schemes was interesting...
...but after looking at how much more vivid and colorful the movie merchandise is opposed to the actual movie designs, we might see greater differences between Falconer and Tracker. We might also see brighter, more vivid colors in the central region of their heads. Here's my mock-up of what I think HT's work will look like. I got this idea after looking closely at my NECA Falconer. They used green for the outer scaly parts, but where the concave ridges and warps began, they used yellow. I figured I'd use that way of thinking for these:
Thoughts?