RAL 040 35 50
Rich Copper
RAL 040 35 50 Rich Copper is defined by hue 040, lightness 35, and chroma 50, a bold high-chroma orange-yellow that captures the lustre of freshly polished bronze. Designers choose it for bronze-effect architectural cladding, craft brewery feature elements, and premium metalwork finishes. The strong chroma at moderate-dark lightness delivers a colour that is both luxurious and deeply warm.
Color Reference
The RAL Design system uses Hue-Lightness-Chroma (HLC) notation. Hue describes the color family (0-360°), Lightness describes brightness (0-100), and Chroma describes saturation intensity (0-100+).
WCAG 2.1 AA requires 4.5:1 contrast for normal text. Results show this color as a background.
Spectrum & Perceptual Position
CIELAB is a perceptually uniform color space. Euclidean distance between two colors in this diagram closely matches human visual difference. The dot size shows your selected color; slightly larger dots are the nearest perceptual neighbors.
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Reference + opposite hue with tonal variations
Contrast ratios follow WCAG 2.1 guidelines. Green (≥4.5:1) passes AA for normal text. Amber (≥3:1) passes for large text only. Grey indicates low contrast.
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