Colour

#81183F

#81183F
Red
Dark
Nearest: Brown

#81183F is a red with RGB values 129, 24, 63 and HSL 338°, 69%, 30%. It is a dark colour, so white text on it reaches 9.8:1 contrast (AAA for normal text). The nearest named colour is Brown.

Colour values

#81183F#81183F

HEX#81183F

RGBrgb(129, 24, 63)

RGB (0–1)0.5059, 0.0941, 0.2471

RGB percentages50.6%, 9.4%, 24.7%

HSLhsl(337.7, 68.6%, 30%)

HSV / HSBhsv(337.7, 81.4%, 50.6%)

CMYK0%, 81.4%, 51.2%, 49.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer8,460,351

CSS custom property--colour: #81183F;

Brightness & contrast

Relative luminance0.05679WCAG 2.x, 0 is black and 1 is white

Perceived brightness75.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 9.83:1

Contrast with white9.83:1WCAG normal text: AAA

Contrast with black2.14:1WCAG normal text: Fail

Greyscale equivalent#313131

Inverted#7EE7C0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#333640no red cones; affects about 1% of men; ΔE 46.4 from the original

Deuteranopia#4E4B3Dno green cones; the most common form, about 1% of men; ΔE 47.8 from the original

Tritanopia#8D0029no blue cones; rare, and affects men and women equally; ΔE 17.1 from the original

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

Contrast with white, large text9.83:1WCAG large text: AAA

Contrast with black, large text2.14:1WCAG large text: Fail

Named colours

Brown · ΔE 28.2 Indian red · ΔE 30.7 Pale violetred · ΔE 32.2 Maroon · ΔE 34.2 Medium violet red · ΔE 35.4 Firebrick · ΔE 36.6

Nearest named CSS colourBrown (#A52A2A)ΔE 28.19, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#18815A

Analogous#811873, #812618

Triadic#3F8118, #183F81

Split complementary#188125, #187381

Tetradic#738118, #18815A, #261881

Tints, shades & saturation

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

Lighter +40%#E77EA5

Lighter +30%#DF5387

Lighter +20%#D72869

Lighter +10%#AC2054

Darker −10%#56102A

Darker −20%#2B0815

Darker −30%#000000

Darker −40%#000000

More saturated +25%#94053A

Less saturated −25%#6E2B44

Channel breakdown

R129

G24

B63

Red129 (50.6%)

Green24 (9.4%)

Blue63 (24.7%)

Hue337.71°

Saturation (HSL)68.63%

Lightness30%

Dominant channelRed

Hex per channelR 81 · G 18 · B 3F

Keep nerding

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#81183F

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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