Colour

#51000B

#51000B
Red
Dark
Nearest: Maroon

#51000B is a red with RGB values 81, 0, 11 and HSL 352°, 100%, 16%. It is a dark colour, so white text on it reaches 15.5:1 contrast (AAA for normal text). The nearest named colour is Maroon.

Colour values

#51000B#51000B

HEX#51000B

RGBrgb(81, 0, 11)

RGB (0–1)0.3176, 0, 0.0431

RGB percentages31.8%, 0%, 4.3%

HSLhsl(351.9, 100%, 15.9%)

HSV / HSBhsv(351.9, 100%, 31.8%)

CMYK0%, 100%, 86.4%, 68.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,308,427

CSS custom property--colour: #51000B;

Brightness & contrast

Relative luminance0.01773WCAG 2.x, 0 is black and 1 is white

Perceived brightness44.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 15.5:1

Contrast with white15.5:1WCAG normal text: AAA

Contrast with black1.35:1WCAG normal text: Fail

Greyscale equivalent#121212

Inverted#AEFFF4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#1C190Bno red cones; affects about 1% of men; ΔE 38 from the original

Deuteranopia#302A07no green cones; the most common form, about 1% of men; ΔE 37.7 from the original

Tritanopia#5A0005no blue cones; rare, and affects men and women equally; ΔE 6.5 from the original

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

Contrast with white, large text15.5:1WCAG large text: AAA

Contrast with black, large text1.35:1WCAG large text: Fail

Named colours

Maroon · ΔE 26.5 Brown · ΔE 30.2 Dark red · ΔE 31.5 Saddle brown · ΔE 34 Sienna · ΔE 35 Firebrick · ΔE 38

Nearest named CSS colourMaroon (#800000)ΔE 26.54, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#005146

Analogous#510033, #511D00

Triadic#0B5100, #000B51

Split complementary#00511D, #003451

Tetradic#345100, #005146, #1E0051

Tints, shades & saturation

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

Lighter +40%#FF1E3D

Lighter +30%#EA0020

Lighter +20%#B70019

Lighter +10%#840012

Darker −10%#1E0004

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#51000B

Less saturated −25%#470A12

Channel breakdown

R81

B11

Red81 (31.8%)

Green0 (0%)

Blue11 (4.3%)

Hue351.85°

Saturation (HSL)100%

Lightness15.88%

Dominant channelRed

Hex per channelR 51 · G 00 · B 0B

Keep nerding

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#51000B

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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