Native Instruments MASCHINE MK3 Groove Production Studio (Black) - Manual (Page 64)

► Right-click on the desired Sound slots, select Color in the context menu, and select the
desired color according to the type of percussion in that Sound slot.
Here is an example of how you could color Sounds:
Your drum kit full of colors.
This helps you see much quicker where the kicks, the snares, etc., are.
Building Your Own Drum Kit
Customizing Your Drum Kit
MASCHINE - Getting Started - 64