The walleye in Cirrus are blue too - all of them; shallow, deep - they all seem to have the same color and we don't fish them any different.  Move down to Quetico, Kasa or Soho and they are the gold color again.  We've caught blueish walleye in Jean but not the brilliant color of Cirrus.  I've never received a solid answer as to why either.  If you find out let us know.