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From Wikipedia, the free encyclopedia

Blood red
 
About these coordinates     Color coordinates
Hex triplet#660000
sRGBB (r, g, b)(102, 0, 0)
HSV (h, s, v)(0°, 100%, 40%)
CIELChuv (L, C, h)(19, 65, 12°)
SourceThom Poole's 2017 book Life of Colour[1]
ISCC–NBS descriptorDeep reddish brown
B: Normalized to [0–255] (byte)

The colour blood red is a dark shade of the colour red meant to resemble the colour of human blood (which is composed of oxygenated red erythrocytes, white leukocytes, and yellow blood plasma).[2] It is the iron in hemoglobin specifically that gives blood its red colour. The actual colour ranges from crimson to a dark brown-blood depending on how oxygenated the blood is, and may have a slightly orange hue.

Deoxygenated blood, which circulates closer to the body's surface and which is therefore generally more likely to be seen than oxygenated blood, issues from bodily veins in a dark red state, but quickly oxygenates upon exposure to air, turning a brighter shade of red. This happens more quickly with smaller volumes of blood such as a pinprick and less quickly from cuts or punctures that cause greater blood flows such as a puncture in the basilic vein: all blood collected during a phlebotomy procedure is deoxygenated blood, and it does not usually have a chance to become oxygenated upon leaving the body. Deoxygenated blood is sometimes misconstrued as being blue.[3]

Arterial blood, which is already oxygenated, is also already a brighter shade of red— this is the blood see from a pulsating neck, arm, or leg wound, and it does not change colour upon exposure to air.[4] The colour "blood red", therefore, covers both these states: the darker deoxygenated colour and the brighter oxygenated one. Also, dried blood often has a darker, rust-coloured quality: all dried blood has been oxygenated and then desiccated, causing the cells within it to die. This blood is often darker than either shade of red that can be seen in fresh blood.

In the RGB colour spectrum blood red often consists only of the colour red, with no green or blue component; in the CYMK colour model blood red has no cyan, and consists only of magenta and yellow with a small amount of black. It is frequently darker than either maroon or dark red.[1]

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Transcription

Variants

Different sources have proposed different color schemes for the color blood red. Below are some of these.

Blood red
 
About these coordinates     Color coordinates
Hex triplet#880808
sRGBB (r, g, b)(136, 8, 8)
HSV (h, s, v)(0°, 94%, 53%)
CIELChuv (L, C, h)(28, 89, 12°)
SourceHTML Color Codes[5]
B: Normalized to [0–255] (byte)
Blood red
 
About these coordinates     Color coordinates
Hex triplet#AA0000
sRGBB (r, g, b)(170, 0, 0)
HSV (h, s, v)(0°, 100%, 67%)
CIELChuv (L, C, h)(35, 118, 12°)
Source[6]
ISCC–NBS descriptorVivid red
B: Normalized to [0–255] (byte)
Blood red
 
About these coordinates     Color coordinates
Hex triplet#AF111C
sRGBB (r, g, b)(175, 17, 28)
HSV (h, s, v)(356°, 90%, 69%)
CIELChuv (L, C, h)(37, 114, 11°)
Source[7]
ISCC–NBS descriptorVivid red
B: Normalized to [0–255] (byte)
Blood red
 
About these coordinates     Color coordinates
Hex triplet#830303
sRGBB (r, g, b)(131, 3, 3)
HSV (h, s, v)(0°, 98%, 51%)
CIELChuv (L, C, h)(26, 87, 12°)
Source[8]
ISCC–NBS descriptorDeep reddish brown
B: Normalized to [0–255] (byte)
Blood red
 
About these coordinates     Color coordinates
Hex triplet#7E3517
sRGBB (r, g, b)(126, 53, 23)
HSV (h, s, v)(17°, 82%, 49%)
CIELChuv (L, C, h)(32, 61, 23°)
Source[9]
ISCC–NBS descriptorStrong reddish brown
B: Normalized to [0–255] (byte)

See also

References

  1. ^ a b Thom Poole (2017). Life of Colour. Lulu.com. p. 81. ISBN 978-1-326-65724-6.
  2. ^ Nicholas Eastaugh; Valentine Walsh; Tracey Chaplin; Ruth Siddall (30 March 2007). Pigment Compendium: A Dictionary of Historical Pigments. Routledge. p. 53. ISBN 978-1-136-37385-5.
  3. ^ Noë, Alva (3 February 2017). "Why Do Many Think Human Blood Is Sometimes Blue?". NPR. Retrieved 25 September 2023.
  4. ^ Joel Levy (29 October 2013). Why?: Answers to Everyday Scientific Questions. Houghton Mifflin Harcourt. p. 72. ISBN 978-0-9827322-9-8.
  5. ^ "Blood Red Color, Codes and Facts – HTML Color Codes". HTML Color Codes.
  6. ^ James Rankin; Anna Ullrich (2005). Adobe After Effects 6.5 Magic. New Riders. p. 94. ISBN 978-0-321-26723-8.
  7. ^ "HTML/CSS Color Code for Blood Red".
  8. ^ "Blood red color pallet". color-hex.
  9. ^ "HTML code for #7E3517". Colorhope.
This page was last edited on 17 January 2024, at 23:09
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