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In optics, orange has a wavelength between approximately 585 and 620 nm and a hue of 30° in HSV color space. In the RGB color space it is a secondary color numerically halfway between gamma-compressed red and yellow, as can be seen in the RGB color wheel. The complementary color of orange is azure.
The IALA recommends categorical color codes in 7 colors: red, orange, yellow, green, blue, white & black. Adding redundant coding of luminosity and colorfulness adds information and increases speed and accuracy of color decoding tasks. [3]
Code orange: disaster; Code orange CBRN: CBRN (chemical, biological, radiological, and nuclear) disaster; Code pink: cardiac arrest/medical emergency – infant/child; Code purple: hostage taking/gang activity; Code red: fire; Code silver: gun threat/shooter; Code white: violent/behavioural situation; Code yellow: missing person; Code 33 ...
The first letter of the color code is matched by order of increasing magnitude. The electronic color codes, in order, are: 0 = Black; 1 = Brown; 2 = Red; 3 = Orange; 4 = Yellow; 5 = Green; 6 = Blue; 7 = Violet; 8 = Gray; 9 = White; Easy to remember. A mnemonic which includes color name(s) generally reduces the chances of confusing black and brown.
Orange is the colour between yellow and red on the spectrum of visible light. Human eyes perceive orange when observing light with a dominant wavelength between roughly 585 and 620 nanometres. In traditional colour theory, it is a secondary colour of pigments, produced by mixing yellow and red.
Vivid reddish orange. B: Normalized to [0–255] (byte) Red (RGB), RGB red, or electric red[citation needed] (as opposed to pigment red, shown below) is the brightest possible red that can be reproduced on a computer monitor. This color is an approximation of an orangish red spectral color.
Orange colors: OrangeRed: FF4500: 255, 69, 0 Tomato: FF6347: 255, 99, 71 DarkOrange: FF8C00: 255, 140, 0 Coral: FF7F50: 255, 127, 80 Orange: FFA500: 255, 165, 0 Yellow colors: DarkKhaki: BDB76B: 189, 183, 107 Gold: FFD700: 255, 215, 0 Khaki: F0E68C: 240, 230, 140 PeachPuff: FFDAB9: 255, 218, 185 Yellow: FFFF00: 255, 255, 0 PaleGoldenrod: EEE8AA ...
25-pair color code Pair no. Major color Minor color 1: White: Blue 2: Orange 3: Green 4: Brown 5: Slate 6: Red: Blue 7: Orange 8: Green 9: Brown 10: Slate 11: Black: Blue 12: Orange 13: Green 14: Brown 15: Slate 16: Yellow: Blue 17: Orange 18: Green 19: Brown 20: Slate 21: Violet: Blue 22: Orange 23: Green 24: Brown 25: Slate
International Orange (Aerospace) Color coordinates; Hex triplet: #FF4F00: sRGB B (r, g, b) (255, 79, 0) HSV (h, s, v) (19°, 100%, 100%) CIELCh uv (L, C, h) (59, 152, 18°) Source: ISCC–NBS descriptor: Vivid reddish orange: B: Normalized to [0–255] (byte)
Orange-Red Color coordinates; Hex triplet: #FF4500: sRGB B (r, g, b) (255, 69, 0) HSV (h, s, v) (16°, 100%, 100%) CIELCh uv (L, C, h) (58, 158, 17°) Source: X11: ISCC–NBS descriptor: Vivid reddish orange: B: Normalized to [0–255] (byte)