The most common question that I get asked is how to distinguish color varieties of US stamps. Over the next few months I hope to be able to put together some pretty comprehensive color charts of United States stamps. Ebay only allows 10 photos per guide so please be sure to view the continuation guides

#67b Olive Yellow        #68 Green                 #68a Dark Green         #70 Red Lilac       #70a Brown Lilac

#70b Steel Blue       #70c Violet                  #70d Pale Gray Violet