#511B0D#511B0D

#511B0D is a dark, moderate red. Relative luminance 0.026; OKLCH L 30.4% C 0.085 H 35.5°. Best body text is #FFFFFF at 13.89:1 contrast (WCAG AA passes).

Color values

HEX	#511B0D
RGB	rgb(81, 27, 13)
HSL	hsl(12, 72%, 18%)
HSV	hsv(12, 84%, 32%)
CMYK	cmyk(0%, 66.7%, 84%, 68.2%)
CIE-LAB	lab(18.20, 24.42, 21.77)
CIE-LCH	lch(18.20, 32.71, 41.70°)
OKLab	oklab(30.41% 0.0689 0.0491)
OKLCH	oklch(30.41% 0.085 35.5)
XYZ	xyz(3.8583, 2.5628, 0.6722)
Luminance	0.0256 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511B0D #0D4351

analogous

#510D21 #511B0D #513D0D

triadic

#511B0D #0D511B #1B0D51

tetradic

#511B0D #21510D #0D4351 #3D0D51

square

#511B0D #21510D #0D4351 #3D0D51

split-complementary

#511B0D #0D513D #0D2151

monochromatic

#1A0904 #1C0905 #511B0D #862D15 #BA3E1E

Accessibility & contrast

On white

13.89

#511B0D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#511B0D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511B0D

13.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511B0D	#FFFFFF	#000000	##FFFFFF
##511B0D	1.00	13.89	1.51	13.89
#FFFFFF	13.89	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A250B

Deuteranopia (green-blind)

#37310B

Tritanopia (blue-blind)

#5A0E18

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #511b0d;
/* rgb */ color: rgb(81, 27, 13);
/* oklch */ color: oklch(30.4% 0.085 35.5);

Tailwind

colors: {
  custom: {
    50: '#875a4d',
    500: '#511b0d',
    950: '#000000',
  },
}

SCSS

$custom: #511b0d;
$custom-light: #875a4d;
$custom-dark: #000000;

JSON

{
  "hex": "#511b0d",
  "rgb": {
    "r": 81,
    "g": 27,
    "b": 13
  },
  "hsl": {
    "h": 12.353,
    "s": 72.34,
    "l": 18.431
  },
  "oklch": {
    "l": 0.30409,
    "c": 0.08464,
    "h": 35.5
  },
  "luminance": 0.02562
}

Semantic roles & 50–950 ramp

primary

#511B0D

secondary

#2E798C

accent

#CAEF39

background

#F8F5F4

surface

#F0E9E7

border

#CBC5C3

text

#0C0401

muted

#7D7977

Preview Lab

Preview with #511B0D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →