Seems like a no-brainer to me: It would be incredibly helpful to have an auto-generated legend for interfaces that shows users what the colors represent in the view. As it is now, the coloring helps to visually provide some differences but doesn't contain any usable information unless you can easily recall what 6 or 7 different colors mean.
I think this would benefit most users!
Bonus points for adding a color palette that is friendly for users with color vision issues.
