Colour

#51001D

#51001D
Red
Dark
Nearest: Maroon

#51001D is a red with RGB values 81, 0, 29 and HSL 339°, 100%, 16%. It is a dark colour, so white text on it reaches 15.4:1 contrast (AAA for normal text). The nearest named colour is Maroon.

Colour values

#51001D#51001D

HEX#51001D

RGBrgb(81, 0, 29)

RGB (0–1)0.3176, 0, 0.1137

RGB percentages31.8%, 0%, 11.4%

HSLhsl(338.5, 100%, 15.9%)

HSV / HSBhsv(338.5, 100%, 31.8%)

CMYK0%, 100%, 64.2%, 68.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,308,445

CSS custom property--colour: #51001D;

Brightness & contrast

Relative luminance0.01838WCAG 2.x, 0 is black and 1 is white

Perceived brightness45.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 15.36:1

Contrast with white15.36:1WCAG normal text: AAA

Contrast with black1.37:1WCAG normal text: Fail

Greyscale equivalent#131313

Inverted#AEFFE2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#191A1Dno red cones; affects about 1% of men; ΔE 37.4 from the original

Deuteranopia#2E2A1Bno green cones; the most common form, about 1% of men; ΔE 37.5 from the original

Tritanopia#5A000Dno blue cones; rare, and affects men and women equally; ΔE 13.7 from the original

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

Contrast with white, large text15.36:1WCAG large text: AAA

Contrast with black, large text1.37:1WCAG large text: Fail

Named colours

Maroon · ΔE 35.2 Brown · ΔE 35.7 Black · ΔE 39.6 Dark red · ΔE 39.9 Sienna · ΔE 41.6 Saddle brown · ΔE 42.3

Nearest named CSS colourMaroon (#800000)ΔE 35.2, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#005134

Analogous#510046, #510C00

Triadic#1D5100, #001D51

Split complementary#00510C, #004651

Tetradic#455100, #005134, #0B0051

Tints, shades & saturation

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

Lighter +40%#FF1E6F

Lighter +30%#EA0054

Lighter +20%#B70042

Lighter +10%#84002F

Darker −10%#1E000B

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#51001D

Less saturated −25%#470A20

Channel breakdown

R81

B29

Red81 (31.8%)

Green0 (0%)

Blue29 (11.4%)

Hue338.52°

Saturation (HSL)100%

Lightness15.88%

Dominant channelRed

Hex per channelR 51 · G 00 · B 1D

Keep nerding

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#51001D

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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