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Orange is sometimes used, like red and yellow, as a colour warning of possible danger or calling for caution. A skull against an orange background means a toxic substance or poison. In the colour system devised by the US Department of Homeland Security to measure the threat of terrorist attack, an orange level is second only to a red level.
This is an accepted version of this page This is the latest accepted revision, reviewed on 5 February 2025. Varieties of the color orange Orange Wavelength 585–620 nm Common connotations Autumn, Halloween, Thanksgiving, warmth Color coordinates Hex triplet #FFA500 sRGB B (r, g, b) (255, 165, 0) HSV (h, s, v) (39°, 100%, 100%) CIELCh uv (L, C, h) (75, 105, 45°) Source HTML Color Chart @30 B ...
Hazard symbols may vary in color, background, borders, or accompanying text to indicate specific dangers and levels of risk, such as toxicity classes. These symbols provide a quick, universally understandable visual warning that transcends language barriers, making them more effective than text-based warnings in many situations.
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Orange is the color in the visible spectrum between red and yellow with a wavelength around 585 – 620 nm. In the HSV color space, it has a hue of around 30°.
The background color always matches the tracer color of its paired conductor, and vice versa. The major, or primary group of colors consists of the sequence of white, red, black, yellow, and violet ( mnemonics W hy R un B ackwards, Y ou'll V omit). [ 3 ]
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