Colour

#51222C

#51222C
Red
Dark
Nearest: Black

#51222C is a red with RGB values 81, 34, 44 and HSL 347°, 41%, 23%. It is a dark colour, so white text on it reaches 13:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#51222C#51222C

HEX#51222C

RGBrgb(81, 34, 44)

RGB (0–1)0.3176, 0.1333, 0.1725

RGB percentages31.8%, 13.3%, 17.3%

HSLhsl(347.2, 40.9%, 22.5%)

HSV / HSBhsv(347.2, 58%, 31.8%)

CMYK0%, 58%, 45.7%, 68.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,317,164

CSS custom property--colour: #51222C;

Brightness & contrast

Relative luminance0.03075WCAG 2.x, 0 is black and 1 is white

Perceived brightness53.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 13:1

Contrast with white13:1WCAG normal text: AAA

Contrast with black1.62:1WCAG normal text: Fail

Greyscale equivalent#2D2D2D

Inverted#AEDDD3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2B2B2Cno red cones; affects about 1% of men; ΔE 23.5 from the original

Deuteranopia#37352Bno green cones; the most common form, about 1% of men; ΔE 24.6 from the original

Tritanopia#581D26no blue cones; rare, and affects men and women equally; ΔE 6.6 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text13:1WCAG large text: AAA

Contrast with black, large text1.62:1WCAG large text: Fail

Named colours

Black · ΔE 31.1 Dim grey · ΔE 33.6 Dark slate grey · ΔE 37.4 Sienna · ΔE 39.8 Gray · ΔE 40.7 Saddle brown · ΔE 40.9

Nearest named CSS colourBlack (#000000)ΔE 31.08, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#225147

Analogous#512243, #513022

Triadic#2C5122, #222C51

Split complementary#225130, #224351

Tetradic#435122, #225147, #302251

Tints, shades & saturation

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

Lighter +40%#C77889

Lighter +30%#B7556A

Lighter +20%#994053

Lighter +10%#753140

Darker −10%#2D1318

Darker −20%#090405

Darker −30%#000000

Darker −40%#000000

More saturated +25%#5F1424

Less saturated −25%#433034

Channel breakdown

R81

G34

B44

Red81 (31.8%)

Green34 (13.3%)

Blue44 (17.3%)

Hue347.23°

Saturation (HSL)40.87%

Lightness22.55%

Dominant channelRed

Hex per channelR 51 · G 22 · B 2C

Keep nerding

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#51222C

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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