Understanding Color Dye Numbers: A Guide to Accurate Pigment Identification

In industries ranging from textiles to cosmetics, precise color matching begins with understanding color dye numbers—essential codes that ensure consistency, accuracy, and compliance.

What Are Color Dye Numbers?

Color dye numbers are standardized identifiers assigned to specific pigment compounds, enabling manufacturers and designers to quickly recognize, select, and replicate colors. These numerical codes correlate with chemical composition, hue, and performance, serving as a universal language in color matching across global supply chains.

Common Color Dye Number Formats

Typically structured as a sequence of 3 to 5 digits (e.g., DXF-1234), these numbers encode critical information such as color family, lightfastness rating, and solubility. For example, dye numbers in the 1000 series often denote natural pigments, while higher ranges reflect synthetic, high-stability variants. Understanding these formats prevents errors in batch selection and quality control.

Applications Across Industries

From fabric manufacturing to pharmaceutical coatings, color dye numbers drive efficiency and reliability. In textile dyeing, they ensure color uniformity across large productions; in paints, they verify lightfastness and durability. Cosmetics rely on them for safe, reproducible shade matching—critical for brand consistency and consumer trust.

Mastering color dye numbers unlocks precision in color formulation and quality assurance. Whether you're a designer, chemist, or manufacturer, leveraging these standardized codes ensures accuracy, compliance, and competitive edge. Explore how integrating color dye number systems transforms your workflow today.

List of dyes This is a list of dyes with Colour Index International generic names and numbers and CAS Registry numbers. Note Synonyms should be treated with caution because they are often used inconsistently, see discussion page and external link [1]. Have you ever wondered what hair dye numbers are for? and discover how hair dye numbers can help you get the color you want.

Dye numbers are numerical codes that uniquely identify specific food color additives approved for use in food and beverages. They serve as standardized identifiers, allowing regulatory agencies, manufacturers, and consumers to easily recognize and differentiate between different color additives. 4) Examples of Hair Color Numbering Duplicate numbers before the slash (33/02) signify that the hair color is a very intense color with good ability to cover grey hair.

Duplicate numbers after the slash (7/22) signify that the shade is an intense color. A single number without the slash (1) means the color is neutral. Hair color depth is the first number in the color code before the slash or the period, and indicates the essential color in the dye.

It is indicated by 10 numbers, 1 being the darkest black, and 10 being the lightest blonde. The color depth numbering is a universal system that is the same among different brands of hair dye. 2.

Learn about hair color levels and tones so you can understand the numbers on the box and find your perfect Garnier shade using our Hair Color Number Guide. What are hair color numbers? Hair color numbers are used to categorize and identify various shades of hair color. This hair level numbers system provides useful information about the depth, tone, and intensity of each shade, which helps stylists determine the best match for their clients' hair.

The level system is made up of 10 numbers which help determine the depth level of your natural hair. 1 is black, 5 is light brown, 6 is dark blonde, 7 is blonde and 10 is the lightest blonde. Your L'Oréal Professionnel colourist will analyse your hair and assess your natural base colour in-salon.

WHAT IS A BASE COLOUR? The color index is produced jointly by SDC (Society of Dyers and Colourists) in the UK, and the AATCC (American Association of Textile Chemists and Colorists) in the USA. The index is split into two parts: one part gives the commercial names for the individual dyes; the other part of the index gives the color index number, and lists the commercial names for the dyes using that number.

The International Color Index (C.I.) is the most widely accepted and used system globally for naming and classifying dyes and pigments. This system standardizes and categorizes various dyes and pigments by assigning a unique number to each color, making it an internationally recognized authoritative reference standard.