Recognised as Colour

#81101C

#81101C
Red
Dark
Nearest: Brown

#81101C is a red with RGB values 129, 16, 28 and HSL 354°, 78%, 28%. It is a dark colour, so white text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Brown.

Colour values

#81101C#81101C

HEX#81101C

RGBrgb(129, 16, 28)

RGB (0–1)0.5059, 0.0627, 0.1098

RGB percentages50.6%, 6.3%, 11%

HSLhsl(353.6, 77.9%, 28.4%)

HSV / HSBhsv(353.6, 87.6%, 50.6%)

CMYK0%, 87.6%, 78.3%, 49.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer8,458,268

CSS custom property--colour: #81101C;

Brightness & contrast

Relative luminance0.05122WCAG 2.x, 0 is black and 1 is white

Perceived brightness72.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 10.37:1

Contrast with white10.37:1WCAG normal text: AAA

Contrast with black2.02:1WCAG normal text: Fail

Greyscale equivalent#292929

Inverted#7EEFE3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#36311Bno red cones; affects about 1% of men; ΔE 49.2 from the original

Deuteranopia#514818no green cones; the most common form, about 1% of men; ΔE 49 from the original

Tritanopia#8F0016no blue cones; rare, and affects men and women equally; ΔE 9.7 from the original

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

Contrast with white, large text10.37:1WCAG large text: AAA

Contrast with black, large text2.02:1WCAG large text: Fail

Named colours

Brown · ΔE 12.2 Maroon · ΔE 12.9 Dark red · ΔE 16.7 Firebrick · ΔE 19.9 Sienna · ΔE 25.7 Indian red · ΔE 26.5

Nearest named CSS colourBrown (#A52A2A)ΔE 12.24, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#108175

Analogous#811055, #813C10

Triadic#1C8110, #101C81

Split complementary#10813C, #105581

Tetradic#558110, #108175, #3C1081

Tints, shades & saturation

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

Lighter +40%#ED707D

Lighter +30%#E84254

Lighter +20%#DC1B30

Lighter +10%#AE1626

Darker −10%#540A12

Darker −20%#260508

Darker −30%#000000

Darker −40%#000000

More saturated +25%#91000F

Less saturated −25%#6F222A

Channel breakdown

R129

G16

B28

Red129 (50.6%)

Green16 (6.3%)

Blue28 (11%)

Hue353.63°

Saturation (HSL)77.93%

Lightness28.43%

Dominant channelRed

Hex per channelR 81 · G 10 · B 1C

Keep nerding

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#81101C

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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