Matchable low-e i.g. units and laminates

A neutral blue-green heat treatable and matchable glass laminate or I.G. unit employs a layer system whose visible transmittance increases by at least 4% during heat treatment and whose DeltaE*ab is less than about 3.0 and Deltaa* is less than about 0.7. The sputter coated layer system includes a silver layer sandwiched between nichrome layers and thereafter layers of Si3N4.