If you ordered from battery junction, they do carry a limited supply of M20 Premiums with a WD (white/bluish) tinted LED as opposed to the standard WH (green/yellowish). The WD is $5 dollars more (from the drop down on their page), so I doubt they would have shipped you one of these without you specifying. With the two lights that appear to not have the yellow/green tint, turn them both on the lowest setting (7 lumens), and see if there is still no visible tint at all. If not it's probably just luck of the draw binning that's accountable.