A macro that splits RGB images and colors produced windows

better_RGB_split.ijm

// better split RGB image.
//  @egrandgirard1 & @jmutterer

if (bitDepth==24) {
run("Duplicate...","title="+getTitle);
run("Split Channels");
id=getImageID;
cols=newArray("#8888ff","#88ff88","#ff8888");
for(i=0;i<3;i++) {
   selectImage(id+i);
   //run("8-bit");
   eval('js','IJ.getImage().getWindow().setBackground(Colors.decode("'+cols[i]+'"))');
}
run("Tile");
}