there was a topic a long time ago where i tested a lot let me go find it if i don't i'll make a quick explanation
ADDITION:
Here it is
QUOTE(corbo)
that's wrong because the colors blue, black , orange will depend on the tile set
+space, installation, will go blue and no glowing not even on zerg units it will just be static
+ashlands= orange
+desert= some weird black in shades of red..very difficult to see
+badlands, jungle= black to gray
+twilight= nothing? how weird.....
+artic= blue in shades of gray more like light blue that slowsly glows
ok and dtbc got me thinking and once it happened to me but i did some testing
this test was made in Desert i don't know if it affects it but here it is:
3/1=2/1 2/1=2/1 4/1=2/1 3/1=2/1 5/1=2/1 6/1=2/1 7/1=2/1
3/2=3/2 4/2=3/2 5/2=3/2 6/2=3/2 7/2=3/2
4/3=4/3 5/3=4/3 6/3=4/3 7/3=4/3
5/4=5/4 6/4=5/4 7/4=5/4
6/5=6/5 7/5=6/5
7/6=7/6
things to remember, health depends on tileset
glowing units are zergs, resources, critters and some powerups and beacons and
archons
not glowing units are terrans and protoss and the ones missing
and remember the chart i made up there