#5B180C#5B180C

#5B180C is a dark, moderate red. Relative luminance 0.029; OKLCH L 31.9% C 0.100 H 32.5°. Best body text is #FFFFFF at 13.28:1 contrast (WCAG AA passes).

Color values

HEX	#5B180C
RGB	rgb(91, 24, 12)
HSL	hsl(9, 77%, 20%)
HSV	hsv(9, 87%, 36%)
CMYK	cmyk(0%, 73.6%, 86.8%, 64.3%)
CIE-LAB	lab(19.66, 29.93, 24.45)
CIE-LCH	lch(19.66, 38.64, 39.24°)
OKLab	oklab(31.88% 0.0846 0.0538)
OKLCH	oklch(31.88% 0.1 32.5)
XYZ	xyz(4.7079, 2.9047, 0.6605)
Luminance	0.0290 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B180C #0C4F5B

analogous

#5B0C27 #5B180C #5B3F0C

triadic

#5B180C #0C5B18 #180C5B

tetradic

#5B180C #275B0C #0C4F5B #3F0C5B

square

#5B180C #275B0C #0C4F5B #3F0C5B

split-complementary

#5B180C #0C5B3F #0C275B

monochromatic

#1B0704 #250A05 #5B180C #912613 #C7351A

Accessibility & contrast

On white

13.28

#5B180C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#5B180C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B180C

13.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B180C	#FFFFFF	#000000	##FFFFFF
##5B180C	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)

#2C260A

Deuteranopia (green-blind)

#3C3509

Tritanopia (blue-blind)

#650316

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b180c;
/* rgb */ color: rgb(91, 24, 12);
/* oklch */ color: oklch(31.9% 0.100 32.5);

Tailwind

colors: {
  custom: {
    50: '#90594c',
    500: '#5b180c',
    950: '#000000',
  },
}

SCSS

$custom: #5b180c;
$custom-light: #90594c;
$custom-dark: #000000;

JSON

{
  "hex": "#5b180c",
  "rgb": {
    "r": 91,
    "g": 24,
    "b": 12
  },
  "hsl": {
    "h": 9.114,
    "s": 76.699,
    "l": 20.196
  },
  "oklch": {
    "l": 0.31882,
    "c": 0.10026,
    "h": 32.5
  },
  "luminance": 0.02904
}

Semantic roles & 50–950 ramp

primary

#5B180C

secondary

#2D8696

accent

#D6F335

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0E0401

muted

#7E7977

Preview Lab

Preview with #5B180C

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

Preview Lab → · Contrast checker → · Palette generator →