{TAIL ~ The second parameter} is {HEAD ~ the difference} in “chroma” which is the difference in “strong versus weak color.” 
{ TAIL ~ The second parameter } is { HEAD ~ the difference } in “ chroma ” which is the difference in “ strong versus weak color . ”
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH