Colour

#81081B

#81081B
Red
Dark
Nearest: Brown

#81081B is a red with RGB values 129, 8, 27 and HSL 351°, 88%, 27%. It is a dark colour, so white text on it reaches 10.6:1 contrast (AAA for normal text). The nearest named colour is Brown.

Colour values

#81081B#81081B

HEX#81081B

RGBrgb(129, 8, 27)

RGB (0–1)0.5059, 0.0314, 0.1059

RGB percentages50.6%, 3.1%, 10.6%

HSLhsl(350.6, 88.3%, 26.9%)

HSV / HSBhsv(350.6, 93.8%, 50.6%)

CMYK0%, 93.8%, 79.1%, 49.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer8,456,219

CSS custom property--colour: #81081B;

Brightness & contrast

Relative luminance0.0492WCAG 2.x, 0 is black and 1 is white

Perceived brightness71.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 10.58:1

Contrast with white10.58:1WCAG normal text: AAA

Contrast with black1.98:1WCAG normal text: Fail

Greyscale equivalent#232323

Inverted#7EF7E4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#342F1Ano red cones; affects about 1% of men; ΔE 50.7 from the original

Deuteranopia#504716no green cones; the most common form, about 1% of men; ΔE 50.7 from the original

Tritanopia#8F0012no blue cones; rare, and affects men and women equally; ΔE 10.6 from the original

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

Contrast with white, large text10.58:1WCAG large text: AAA

Contrast with black, large text1.98:1WCAG large text: Fail

Named colours

Brown · ΔE 12.4 Maroon · ΔE 12.7 Dark red · ΔE 16.3 Firebrick · ΔE 19.5 Sienna · ΔE 27.1 Indian red · ΔE 27.2

Nearest named CSS colourBrown (#A52A2A)ΔE 12.35, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#08816E

Analogous#810857, #813208

Triadic#1B8108, #081B81

Split complementary#088132, #085781

Tetradic#578108, #08816E, #320881

Tints, shades & saturation

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

Lighter +40%#F56077

Lighter +30%#F2304E

Lighter +20%#E10E2F

Lighter +10%#B10B25

Darker −10%#510511

Darker −20%#210207

Darker −30%#000000

Darker −40%#000000

More saturated +25%#890016

Less saturated −25%#701927

Channel breakdown

R129

B27

Red129 (50.6%)

Green8 (3.1%)

Blue27 (10.6%)

Hue350.58°

Saturation (HSL)88.32%

Lightness26.86%

Dominant channelRed

Hex per channelR 81 · G 08 · B 1B

Keep nerding

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#81081B

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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