Recognised as Colour

#571B0D

#571B0D
Red
Dark
Nearest: Saddle brown

#571B0D is a red with RGB values 87, 27, 13 and HSL 11°, 74%, 20%. It is a dark colour, so white text on it reaches 13.4:1 contrast (AAA for normal text). The nearest named colour is Saddle brown.

Colour values

#571B0D#571B0D

HEX#571B0D

RGBrgb(87, 27, 13)

RGB (0–1)0.3412, 0.1059, 0.051

RGB percentages34.1%, 10.6%, 5.1%

HSLhsl(11.4, 74%, 19.6%)

HSV / HSBhsv(11.4, 85.1%, 34.1%)

CMYK0%, 69%, 85.1%, 65.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,708,557

CSS custom property--colour: #571B0D;

Brightness & contrast

Relative luminance0.02839WCAG 2.x, 0 is black and 1 is white

Perceived brightness52.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 13.39:1

Contrast with white13.39:1WCAG normal text: AAA

Contrast with black1.57:1WCAG normal text: Fail

Greyscale equivalent#272727

Inverted#A8E4F2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2C270Bno red cones; affects about 1% of men; ΔE 29.7 from the original

Deuteranopia#3B340Bno green cones; the most common form, about 1% of men; ΔE 29.6 from the original

Tritanopia#600B18no blue cones; rare, and affects men and women equally; ΔE 12 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text13.39:1WCAG large text: AAA

Contrast with black, large text1.57:1WCAG large text: Fail

Named colours

Saddle brown · ΔE 25.2 Maroon · ΔE 26.4 Sienna · ΔE 27.4 Brown · ΔE 30 Dark red · ΔE 31.2 Firebrick · ΔE 37.8

Nearest named CSS colourSaddle brown (#8B4513)ΔE 25.18, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#0D4957

Analogous#570D24, #57400D

Triadic#0D571B, #1B0D57

Split complementary#0D5740, #0D2457

Tetradic#24570D, #0D4957, #400D57

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#E4694C

Lighter +30%#DC4421

Lighter +20%#B0371A

Lighter +10%#832914

Darker −10%#2B0D06

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#641300

Less saturated −25%#4B2319

Channel breakdown

R87

G27

B13

Red87 (34.1%)

Green27 (10.6%)

Blue13 (5.1%)

Hue11.35°

Saturation (HSL)74%

Lightness19.61%

Dominant channelRed

Hex per channelR 57 · G 1B · B 0D

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#571B0D

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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