#511B11#511B11

#511B11 is a dark, moderate red. Relative luminance 0.026; OKLCH L 30.5% C 0.084 H 32.5°. Best body text is #FFFFFF at 13.86:1 contrast (WCAG AA passes).

Color values

HEX	#511B11
RGB	rgb(81, 27, 17)
HSL	hsl(9, 65%, 19%)
HSV	hsv(9, 79%, 32%)
CMYK	cmyk(0%, 66.7%, 79%, 68.2%)
CIE-LAB	lab(18.25, 24.63, 19.70)
CIE-LCH	lch(18.25, 31.54, 38.66°)
OKLab	oklab(30.46% 0.0704 0.0449)
OKLCH	oklch(30.46% 0.084 32.5)
XYZ	xyz(3.8869, 2.5742, 0.8224)
Luminance	0.0257 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#511B11 #114751

analogous

#511127 #511B11 #513B11

triadic

#511B11 #11511B #1B1151

tetradic

#511B11 #275111 #114751 #3B1151

square

#511B11 #275111 #114751 #3B1151

split-complementary

#511B11 #11513B #112751

monochromatic

#190805 #1E0A06 #511B11 #842C1C #B63D26

Accessibility & contrast

On white

13.86

#511B11 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#511B11 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #511B11

13.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##511B11	#FFFFFF	#000000	##FFFFFF
##511B11	1.00	13.86	1.51	13.86
#FFFFFF	13.86	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A2510

Deuteranopia (green-blind)

#37310F

Tritanopia (blue-blind)

#5A0E19

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #511b11;
/* rgb */ color: rgb(81, 27, 17);
/* oklch */ color: oklch(30.5% 0.084 32.5);

Tailwind

colors: {
  custom: {
    50: '#875a4f',
    500: '#511b11',
    950: '#000000',
  },
}

SCSS

$custom: #511b11;
$custom-light: #875a4f;
$custom-dark: #000000;

JSON

{
  "hex": "#511b11",
  "rgb": {
    "r": 81,
    "g": 27,
    "b": 17
  },
  "hsl": {
    "h": 9.375,
    "s": 65.306,
    "l": 19.216
  },
  "oklch": {
    "l": 0.30463,
    "c": 0.08352,
    "h": 32.5
  },
  "luminance": 0.02574
}

Semantic roles & 50–950 ramp

primary

#511B11

secondary

#347D8A

accent

#CEE840

background

#F8F5F4

surface

#F0E9E7

border

#CBC5C3

text

#0C0402

muted

#7D7978

Preview Lab

Preview with #511B11

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

Preview Lab → · Contrast checker → · Palette generator →