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Recognised as Colour

#B71A2E

  • #B71A2E
  • Red
  • Dark
  • Nearest: Firebrick

#B71A2E is a red with RGB values 183, 26, 46 and HSL 352°, 75%, 41%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B71A2E#B71A2E
HEX#B71A2E
RGBrgb(183, 26, 46)
RGB (0–1)0.7176, 0.102, 0.1804
RGB percentages71.8%, 10.2%, 18%
HSLhsl(352.4, 75.1%, 41%)
HSV / HSBhsv(352.4, 85.8%, 71.8%)
CMYK0%, 85.8%, 74.9%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,999,790
CSS custom property--colour: #B71A2E;

Brightness & contrast

Relative luminance0.11003WCAG 2.x, 0 is black and 1 is white
Perceived brightness103.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.56:1
Contrast with white6.56:1WCAG normal text: AA
Contrast with black3.2:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#48E5D1

Colour vision & accessibility

Protanopia#4F482Dno red cones; affects about 1% of men; ΔE 63.6 from the original
Deuteranopia#756928no green cones; the most common form, about 1% of men; ΔE 63.9 from the original
Tritanopia#CA0024no blue cones; rare, and affects men and women equally; ΔE 13 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.56:1WCAG large text: AAA
Contrast with black, large text3.2:1WCAG large text: AA

Named colours

Nearest named CSS colourFirebrick (#B22222)ΔE 7.29, clearly different but related
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

Complementary#1AB7A3
Analogous#B71A7D, #B7541A
Triadic#2EB71A, #1A2EB7
Split complementary#1AB754, #1A7DB7
Tetradic#7DB71A, #1AB7A3, #551AB7

Tints, shades & saturation

Lighter +40%#F3AAB3
Lighter +30%#ED7D8C
Lighter +20%#E65164
Lighter +10%#E0243C
Darker −10%#8A1423
Darker −20%#5E0D18
Darker −30%#31070C
Darker −40%#040101
More saturated +25%#D1001B
Less saturated −25%#9D3441

Channel breakdown

R183
G26
B46
Red183 (71.8%)
Green26 (10.2%)
Blue46 (18%)
Hue352.36°
Saturation (HSL)75.12%
Lightness40.98%
Dominant channelRed
Hex per channelR B7 · G 1A · B 2E

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Every value on this page was computed from “b71a2e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.