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