Paint matching
Why RAL colour names change between languages and shops
RAL numbers stay fixed while the names get translated, shortened and reused by shops. Why the four digits are what to quote, plus a checklist for ordering.
Read the noteChart / 9000 series / RAL 9004 Signal black
RAL 9004 Signal black
A very dark, almost neutral grey, with a slightly cool cast on screen. First published on this chart 2 March 2013.
This swatch is a screen approximation of the colour. Check a physical RAL fan deck or a painted sample of the actual product before you order or match anything.
| Hex (sRGB) | #2E3032 |
|---|---|
| RGB | 46, 48, 50 |
| HSL | 210°, 4%, 19% |
| CMYK (naive) | 8, 4, 0, 80 |
| CIE Lab (from sRGB) | 19.7, -0.4, -1.6 |
| Relative luminance | 2.9% |
| Text contrast | white text 13.2:1, black text 1.6:1 |
Values are derived from the approximate hex above. CMYK is a simple conversion, not a print recipe: printers convert through their own profiles. Luminance is a screen figure, not a measured light reflectance value (LRV) from a paint data sheet.
How RAL 9004 reads
Signal black is a soft black with a faint grey cast, lighter than RAL 9005 jet black and close to RAL 9017 traffic black. It reads as black in most light.
Where it turns up
It suits machinery, signage, railings and furniture. Satin finishes hide dust better than gloss on dark colours, and a dark grey primer helps the first coat cover.
Ordering RAL 9004 in paint or powder
Quote the number, not just the name: say "RAL Classic 9004" and add the gloss level, the product type (wall paint, metal paint, powder, aerosol) and the surface. The same number mixed by two makers, or in two gloss levels, can look slightly different, so keep a whole job in one batch and look at a sample in daylight first. The paint counter guide covers the questions to ask.