couldn't have worded this more perfectly myself.
Lots of morphs could yellow it up, and I dont see any champ or calico in the flatline AT ALL. The champagne has a crazy pattern and often the line isn't filled in such as in the example that was posted. The dark line on the flatline lookS EXACTLY like a darker version of that desert clown, same pattern.
I'm guessing its a desert clown something something....