1. RAL colour space system
    RAL Classic  RAL F9  RAL Design  RAL Effect  RAL Digital 

2. See also

3. References

4. External links

RAL is a colour matching system used in Europe that is created and administrated by the German RAL gGmbH^[1] (RAL non-profit LLC), which is a subsidiary of the German RAL Institute. In colloquial speech RAL refers to the RAL Classic system, mainly used for varnish and powder coating but nowadays there are reference panels for plastics as well.

Approved RAL products are provided with a hologram as of early 2013 to make unauthorised versions difficult to produce. Imitations may show different hue and colour when observed under various light sources.

RAL colour space system

RAL Classic

In 1927 the German Reichs-Ausschuß für Lieferbedingungen und Gütesicherung (Imperial Commission for Delivery Terms and Quality Assurance) invented a collection of forty colours under the name of "RAL 840".^[2] Prior to that date manufacturers and customers had to exchange samples to describe a tint, whereas from then on they would rely on numbers.^[3]

In the 1930s the numbers were changed uniformly to four digits and the collection was renamed to "RAL 840 R" (R for revised). With tints constantly added to the collection, it was revised again in 1961 and changed to "RAL 840-HR", which consists of 210 colours and is in use to this day. In the 1960s the colours were given supplemental names to avoid confusion in case of transposed digits.

As "RAL 840-HR" covered only matte paint the 1980s saw the invention of "RAL 841-GL" for glossy surfaces, limited to 193 colours.^[4] A main criterion for colours in the RAL Classic collection is to be of "paramount interest". Therefore, most of the colours in it are used on warning and traffic signs or are dedicated to government agencies and public services (for example: RAL 1004 - Swiss Postal Service, RAL 1021 - Austrian Postal Service, RAL 1032 - German Postal Service).^[5] The first digit relates to the shade of the colour:

RAL F9

This collection, which follows the naming of RAL Classic, was invented in 1984.{{Citation needed|date=January 2019}} It is nowadays made up of ten colours (RAL 1039-F9 Sand beige, RAL 1040-F9 Clay beige, RAL 6031-F9 Bronze green, RAL 6040-F9-Light olive, RAL 7050-F9 Camouflage grey, RAL 8027-F9 Leather brown, RAL 8031-F9 Sand brown, RAL 9021-F9 Tar black and RAL 6031-HR Bronze green for non-camouflage applications), used by the Bundeswehr for military camouflage coating.^[6][7]

RAL Design

In 1993 a new colour matching system was introduced, tailored to the needs of architects, designers and advertisers. It started with 1,688 colours and was revised to 1,625 colours. The colours of RAL Classic and RAL Design do not intersect.

Contrary to the preceding systems, RAL Design features no names and its numbering follows a scheme based on the CIELAB colour space, specifically cylindrical CIEHLC. Each colour is represented by seven digits, grouped in a triple and two pairs, representing hue (000–360 degrees, angle in the CIELab colour wheel), lightness (same as in L*a*b*) and chroma (relative saturation). The three numeric components of almost all RAL Design colours are multiples of 5, the majority are divisible by 10.^[8]

Conversion from RAL Design number tuple to CIELAB

"RAL 210 50 15" converts to L* = 50, a* = −12.99, b* = −7.5, for instance.

RAL Effect

RAL Effect comprises 420 solid colours and seventy metallic colours. It is the first collection from RAL to be based on waterborne paint systems.

RAL Digital

RAL Digital is software that allows designers to navigate the RAL colour space.

See also

• List of RAL colors
• Colour chart, other colour systems and charts
• Federal Standard 595
• Natural Color System
• Pantone

References

External links

• Official RAL Colours website

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