Safety Signs and Labels - ANSI Webstore ISO 3864-2:2016 Graphical symbols - Safety colours and safety signs - Part 2: Design principles for product safety labels. ISO 3864-2:2016 establishes additional principles to ISO 3864 1 for the design of safety labels for products, i.e. any items manufactured and offered for sale in the normal course of commerce, including but not limited to consumer products and industrial equipment.