Lager may be green in color.
  The depth of colour comes from the specific grain bill used in the beers; paler lagers use unroasted barley and may even add other grains such as rice or corn to lighten the color and provide a crisp, bright finish to the flavour
It is possible to use lager yeast in a warm fermentation process, such as with American steam beer; while German Altbier and Klsch are brewed with Saccharomyces cerevisiae top-fermenting yeast at a warm temperature, but with a cold-storage finishing stage, and classified as obergriges lagerbier (top-fermented lager beer)

