Before revision: GHS symbol 63x63px|Flammable substance Colours and substances are typically as follows: +ISO 20560-1 Colours and substances Substance Background colour Text colourHazardous substances Yellow BlackGas (liquid or gaseous) Grey WhiteLiquids & solids (powder/granulate) Black WhiteAcids Orange BlackAlkalis Violet WhiteFire fighting medium Red WhiteWater Green WhiteAir Blue White International Standard ISO 20560-2 Safety information for the content of piping systems and tanks — Part 2: Tanks, provides a similar colour scheme for tanks.
After revision: :2020GHS symbol 63x63px|Flammable substance Colours and substances are typically as follows: +ISO 20560-1 Colours and substances Substance Background colour Text colourHazardous substances Yellow BlackGas (liquid or gaseous) Grey WhiteLiquids & solids (powder/granulate) Black WhiteAcids Orange BlackAlkalis Violet WhiteFire fighting medium Red WhiteWater Green WhiteAir Blue White International Standard ISO 20560-2 Safety information for the content of piping systems and tanks — Part 2: Tanks, provides a similar colour scheme for tanks.