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Recognised as Colour

#C81D2B

  • #C81D2B
  • Red
  • Dark
  • Nearest: Firebrick

#C81D2B is a red with RGB values 200, 29, 43 and HSL 355°, 75%, 45%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#C81D2B#C81D2B
HEX#C81D2B
RGBrgb(200, 29, 43)
RGB (0–1)0.7843, 0.1137, 0.1686
RGB percentages78.4%, 11.4%, 16.9%
HSLhsl(355.1, 74.7%, 44.9%)
HSV / HSBhsv(355.1, 85.5%, 78.4%)
CMYK0%, 85.5%, 78.5%, 21.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,114,667
CSS custom property--colour: #C81D2B;

Brightness & contrast

Relative luminance0.13333WCAG 2.x, 0 is black and 1 is white
Perceived brightness112.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.73:1
Contrast with white5.73:1WCAG normal text: AA
Contrast with black3.67:1WCAG normal text: Fail
Greyscale equivalent#424242
Inverted#37E2D4

Colour vision & accessibility

Protanopia#574F29no red cones; affects about 1% of men; ΔE 68.5 from the original
Deuteranopia#807323no green cones; the most common form, about 1% of men; ΔE 68.6 from the original
Tritanopia#DD0025no blue cones; rare, and affects men and women equally; ΔE 12.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.73:1WCAG large text: AAA
Contrast with black, large text3.67:1WCAG large text: AA

Named colours

Nearest named CSS colourFirebrick (#B22222)ΔE 8.76, clearly different but related
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

Complementary#1DC8BA
Analogous#C81D81, #C8641D
Triadic#2BC81D, #1D2BC8
Split complementary#1DC864, #1D81C8
Tetradic#81C81D, #1DC8BA, #641DC8

Tints, shades & saturation

Lighter +40%#F5BCC0
Lighter +30%#EF8F97
Lighter +20%#E8636E
Lighter +10%#E23644
Darker −10%#9B1721
Darker −20%#6F1018
Darker −30%#420A0E
Darker −40%#160305
More saturated +25%#E50013
Less saturated −25%#AB3A43

Channel breakdown

R200
G29
B43
Red200 (78.4%)
Green29 (11.4%)
Blue43 (16.9%)
Hue355.09°
Saturation (HSL)74.67%
Lightness44.9%
Dominant channelRed
Hex per channelR C8 · G 1D · B 2B

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Every value on this page was computed from “c81d2b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.