RAL 1016
Sulfur Yellow
RAL 1016 Sulfur Yellow is a vivid, almost fluorescent yellow-green that is impossible to miss. This is the standard color for European ambulances in accordance with CEN 1789, chosen specifically for its exceptional visibility in all lighting conditions. The color's high luminance value makes it one of the most eye-catching shades in the RAL system. Beyond emergency vehicles, it is used for high-visibility safety equipment, industrial hazard markings, and sports equipment where maximum visibility is critical.
Color Reference
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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