Colour

#51231D

#51231D
Red
Dark
Nearest: Saddle brown

#51231D is a red with RGB values 81, 35, 29 and HSL 7°, 47%, 22%. It is a dark colour, so white text on it reaches 13.1:1 contrast (AAA for normal text). The nearest named colour is Saddle brown.

Colour values

#51231D#51231D

HEX#51231D

RGBrgb(81, 35, 29)

RGB (0–1)0.3176, 0.1373, 0.1137

RGB percentages31.8%, 13.7%, 11.4%

HSLhsl(6.9, 47.3%, 21.6%)

HSV / HSBhsv(6.9, 64.2%, 31.8%)

CMYK0%, 56.8%, 64.2%, 68.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,317,405

CSS custom property--colour: #51231D;

Brightness & contrast

Relative luminance0.0304WCAG 2.x, 0 is black and 1 is white

Perceived brightness52.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 13.06:1

Contrast with white13.06:1WCAG normal text: AAA

Contrast with black1.61:1WCAG normal text: Fail

Greyscale equivalent#2C2C2C

Inverted#AEDCE2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2E2B1Cno red cones; affects about 1% of men; ΔE 23 from the original

Deuteranopia#3A341Cno green cones; the most common form, about 1% of men; ΔE 22.5 from the original

Tritanopia#591B22no blue cones; rare, and affects men and women equally; ΔE 8.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text13.06:1WCAG large text: AAA

Contrast with black, large text1.61:1WCAG large text: Fail

Named colours

Saddle brown · ΔE 32.3 Black · ΔE 32.4 Sienna · ΔE 33 Dim grey · ΔE 35 Maroon · ΔE 36.5 Brown · ΔE 37.3

Nearest named CSS colourSaddle brown (#8B4513)ΔE 32.34, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1D4B51

Analogous#511D31, #513D1D

Triadic#1D5123, #231D51

Split complementary#1D513D, #1D3151

Tetradic#31511D, #1D4B51, #3D1D51

Tints, shades & saturation

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

Lighter +40%#CB796F

Lighter +30%#BE5749

Lighter +20%#9C4338

Lighter +10%#77332A

Darker −10%#2B1310

Darker −20%#060302

Darker −30%#000000

Darker −40%#000000

More saturated +25%#5F180F

Less saturated −25%#432E2B

Channel breakdown

R81

G35

B29

Red81 (31.8%)

Green35 (13.7%)

Blue29 (11.4%)

Hue6.92°

Saturation (HSL)47.27%

Lightness21.57%

Dominant channelRed

Hex per channelR 51 · G 23 · B 1D

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#51231D

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

Nerdulate something else