VPIP < 18 PFR < 18 - TAG. This would be Yellow VPIP < 18 PFR < 8 - TP. This would be Light Blue VPIP > 30 PFR > 30 - LAG. This would be Dark Blue VPIP > 30 PFR < 12 - LP. This would be purple.
If your color system is just duplicating the work of your HUD, then it's only value is in saving you that fraction of a second it takes you to look at 2 numbers on your HUD. Why bother?