What are RAL colours?
RAL colours are standardised colour references used to identify exact shades across paints, coatings, plastics, metals and manufactured products. Instead of describing a finish as "dark grey" or "cream", a RAL code gives a shared reference that designers, fabricators, decorators and suppliers can understand. In short, if you're asking "What are RAL Colours?", they are a common standard that makes colour communication precise.
The RAL colour system began in Germany in 1927 and consisted of 40 colours, and is now widely used across Europe, including the UK. It is especially common in architecture, construction, powder coating, window and door frames, signage, furniture, kitchens, industrial finishes and product design.
How the RAL colour system works
Each RAL colour is assigned a unique code and name. In the widely used RAL Classic range, the code is usually four digits, such as RAL 7016 for Anthracite Grey or RAL 9005 for Jet Black. These numbers help avoid confusion between similar-looking shades.
A RAL reference does not simply describe a colour visually. It acts as a specification. This means that if a customer chooses a RAL shade for aluminium doors, metal railings or painted panels, the manufacturer can match that colour more reliably than if the instruction were based on a vague description.
Why RAL colours are useful
RAL colours are popular because they create consistency. This is particularly important when several suppliers, materials or production stages are involved.
Common benefits include:
- Clear communication: Everyone works from the same colour reference.
- Better colour matching: Useful when replacing, repainting or extending existing work.
- Professional specification: Ideal for architects, contractors and designers.
- Reduced errors: Less risk of choosing the wrong shade from a description alone.
- Versatility: Suitable for domestic, commercial and industrial projects.
For UK projects, RAL colours are often used when specifying powder-coated aluminium, steelwork, cladding, garage doors, shopfronts and external fixtures, where specifiers may consult a RAL colour guide or supplier swatches.
What is a RAL colour chart?
A RAL colour chart is a visual guide that shows available RAL shades along with their codes and names. It helps users compare colours and narrow down options before placing an order or requesting a finish.
However, screens can display colours differently depending on brightness, calibration and device settings. For accurate selection, a physical RAL colour chart or swatch is usually the best option, especially when the final finish needs to match existing materials or meet a formal specification.
If you are using an online RAL colour chart, treat it as a helpful starting point rather than a final approval tool.
RAL Classic, RAL Design and other ranges
The most familiar range is RAL Classic (216 colours), which is commonly used in trade, manufacturing and construction. It includes many well-known colours used for architectural coatings and general specifications.
Each RAL colour family in the Classic range is grouped by its first digit: 1xxx (Yellow hues), 2xxx (Orange hues), 3xxx (Red hues), 4xxx (Violet hues), 5xxx (Blue hues), 6xxx (Green hues), 7xxx (Grey hues), 8xxx (Brown hues) and 9xxx (White & Black hues).
Other RAL ranges exist for more detailed colour work. RAL Design (1,825 colours) was introduced in 1993 and offers a broader selection for designers and colour planners, while specialist ranges may be used for decorative or effect finishes. For most everyday UK enquiries, though, "RAL colour" usually refers to RAL Classic unless stated otherwise.
How to choose the right RAL colour
When using a RAL colour guide, consider where and how the colour will appear. A shade may look different indoors, outdoors, in direct sunlight or under artificial lighting. The material and finish also matter; gloss, matt, satin and textured coatings can all affect the final appearance.
Before confirming a colour, it is sensible to:
- Check the RAL code and colour name.
- View a physical swatch where possible.
- Consider both the finish and the shade.
- Compare the colour in the environment where it will be used.
- Confirm the specification with your supplier or contractor.
Final thoughts
The RAL colour system is a practical way to define and reproduce colours accurately. Whether you are planning exterior doors, metalwork, signage, interiors or industrial components, RAL references make colour selection clearer and more consistent.
A reliable RAL colour guide or physical chart can help you compare shades with confidence, but always confirm the exact code, finish and application requirements before committing to a final colour.
