ISO

Standard	Name	TC/SC	Link
ISO 3864:1984	Safety colours and safety signs	ISO/TC 145	[1]
ISO 3864-1:2001	Graphical symbols – Safety colours and safety signs -- Part 1: Design principles for safety signs in workplaces and public areas		UNECE
ISO 3864-4:2011	Graphical symbols -- Safety colours and safety signs -- Part 4: Colorimetric and photometric properties of safety sign materials	ISO/TC 145/SC 2	[2]
ISO 3864-3:2012	Graphical symbols -- Safety colours and safety signs -- Part 3: Design principles for graphical symbols for use in safety signs	ISO/TC 145/SC 2	[3]
ISO 7010:2011	Graphical symbols -- Safety colours and safety signs -- Registered safety signs	ISO/TC 145/SC 2	[4]
ISO 12647-5	Graphic technology -- Process control for the manufacture of half-tone colour separations, proof and production prints -- Part 5: Screen printing	ISO/TC 130
ISO 2846-1:2006	Graphic technology -- Colour and transparency of printing ink sets for four-colour printing -- Part 1: Sheet-fed and heat-set web offset lithographic printing	ISO/TC 130
ISO 3664:2009	Graphic technology and photography -- Viewing conditions	ISO/TC 42
ISO 639-6:2009	Codes for the representation of names of languages -- Part 6: Alpha-4 code for comprehensive coverage of language variants	ISO/TC 37/SC 2

UNECE FDIS/ISO 3864-1 - colours described as quadrilaterals in CIELAB.