RAL 000 45 00 — Architecture grey
Mid grey, light reflectance value of 17.6 per cent. This shade sits in the range where colour is assessed — not as a colour, but as an environment in which other colours can be seen correctly.
| Colour code | RAL 000 45 00 |
| Name | Architecture grey |
| Collection | RAL Design System plus |
| Colour group | Grijsas (000) |
| Lightness | L* 45 |
| Chroma | C*ab 00 |
| Lab | 44,7 · -0,5 · -0,4 |
| Hex (indicative) | #696969 |
| Light reflectance value (LRV) | 17.55— official RAL value |
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D3 kleurchipRAL D3 losse kleurchipsPart of RAL D3 losse kleurchips · Item RALD-D3-LOS
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About RAL 000 45 00
Standardised assessment booths have a neutral grey interior, and that is no coincidence. The eye always judges colour relative to its surroundings; a coloured or overly light background shifts the judgement. A neutral grey with no colour direction of its own is the only background that exerts no influence itself. The professional standard sits slightly lighter than this shade, around L* 72, but the principle holds across the whole mid range: the more neutral the environment, the more reliable the judgement.
That also explains why colour assessment in an ordinary workroom is rarely accurate. A yellow wall, a wooden tabletop or a blue overall shifts perception without the assessor noticing.
In use this shade has a downside that follows from the same principle: it takes on the colour of its surroundings. Next to warm timber it tips towards cool, next to a blue surface towards warm. The colour was right on the sample and wrong in the room — with mid greys that is the most common reason for rejection after installation.
| English | Architecture grey |