Native Instruments MASCHINE MIKRO MK3 Groove Production Studio (Black) - Manual (Page 200)

By default each Group has a different color. But you can choose a common default color for Groups
in
Preferences > Colors > Group Default . See section ↑ 3.6.8, Preferences – Colors Page for more
information.
Once you have set a custom color for a Group as described above, the Group will retain its color
when you move it in the Group List, and the color will be stored with the Group when you save the
Group for later use. Note that you can select the same color as the one used by default: In that case
the color (even unchanged) will be considered as a custom color and will follow the Group as you
move it.
5.3.5 Saving Groups
You can save your Groups as individual files (extension “.mxgrp”). This can be only done in the
software.
Saving Your Modifications into the Original Group File
If you have made changes to a Group loaded in your Project, you can save your modifications
as follows:
Managing Sounds, Groups, and Your Project
Managing Groups
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