#5B180D#5B180D

#5B180D is a dark, moderate red. Relative luminance 0.029; OKLCH L 31.9% C 0.100 H 31.9°. Best body text is #FFFFFF at 13.28:1 contrast (WCAG AA passes).

Color values

HEX	#5B180D
RGB	rgb(91, 24, 13)
HSL	hsl(8, 75%, 20%)
HSV	hsv(8, 86%, 36%)
CMYK	cmyk(0%, 73.6%, 85.7%, 64.3%)
CIE-LAB	lab(19.67, 29.96, 23.99)
CIE-LCH	lch(19.67, 38.38, 38.68°)
OKLab	oklab(31.89% 0.0849 0.0529)
OKLCH	oklch(31.89% 0.1 31.9)
XYZ	xyz(4.7142, 2.9072, 0.6936)
Luminance	0.0291 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B180D #0D505B

analogous

#5B0D29 #5B180D #5B3F0D

triadic

#5B180D #0D5B18 #180D5B

tetradic

#5B180D #295B0D #0D505B #3F0D5B

square

#5B180D #295B0D #0D505B #3F0D5B

split-complementary

#5B180D #0D5B3F #0D295B

monochromatic

#1B0704 #250A05 #5B180D #912615 #C6341C

Accessibility & contrast

On white

13.28

#5B180D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#5B180D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B180D

13.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B180D	#FFFFFF	#000000	##FFFFFF
##5B180D	1.00	13.28	1.58	13.28
#FFFFFF	13.28	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C260B

Deuteranopia (green-blind)

#3C350A

Tritanopia (blue-blind)

#650316

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b180d;
/* rgb */ color: rgb(91, 24, 13);
/* oklch */ color: oklch(31.9% 0.100 31.9);

Tailwind

colors: {
  custom: {
    50: '#90594d',
    500: '#5b180d',
    950: '#000000',
  },
}

SCSS

$custom: #5b180d;
$custom-light: #90594d;
$custom-dark: #000000;

JSON

{
  "hex": "#5b180d",
  "rgb": {
    "r": 91,
    "g": 24,
    "b": 13
  },
  "hsl": {
    "h": 8.462,
    "s": 75,
    "l": 20.392
  },
  "oklch": {
    "l": 0.31893,
    "c": 0.10005,
    "h": 31.9
  },
  "luminance": 0.02906
}

Semantic roles & 50–950 ramp

primary

#5B180D

secondary

#2F8795

accent

#D7F236

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0E0401

muted

#7E7977

Preview Lab

Preview with #5B180D

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

Preview Lab → · Contrast checker → · Palette generator →