1. You can create your own color scheme by choosing Color/ColorEditor. Double click on the nodes to change the color. You can shift-click to delete the node. You can Alt-click on a node to save the color scheme as a text format ".clut" file. Place the file in MRIcroGL' s Resources/LUT folder and restart, and you will have the new color scheme available for future use.


2.Alternatively, you can create your own color schemes using the Scripting menu. 
  https://github.com/rordenlab/MRIcroGL12/...