XY Graph Colors (Tracking) to Use Axis X & Y from Themes

Currently, in Movie Clip Editor > Tracking , the marker graph of XY movements seems to be hard-coded to pure red and green (could not find it).

It would be nice if we could customize this or simply use the axis colors in Themes > User Interface > Axis & Gizmo Colors for consistency. Not sure if the Tracks Error should inherit Z.