About Us

The Colour Index is published by the Society of Dyers and Colourists (SDC) and American Association of Textile Chemists and Colourists (AATCC). First published in 1924 it is the definitive guide for essential colorants.

What is the Colour Index

The Colour Index describes the essential colorant of a dye or pigment by application class and chemical class. Assigning a relevant CIGN and CICN allows identification by a world recognised system.

Colour Index Organisation

The Colour Index is organised and run by two technical boards, one responsible for the Dyes, the other responsible for Pigments & Solvent Dyes. These are committees of professional people from the industry they serve.

Colour Index explained

Many terms are used in the Colour Index. Look here to better understand how the colorants are ordered and listed and how to use the Colour Index effectively.

Technical Information

Covering such a wide range of industries use this section to find the definition of a dye and pigment and what makes them different as well as other industries use of colour explained.

Associated Organisations

The SDC and AATCC work with other organisations on the content and use of the Colour Index such as ETAD, CDIA to name a few. This section gives details of those organisations.

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