#5B181C#5B181C

#5B181C is a dark, moderate red. Relative luminance 0.030; OKLCH L 32.1% C 0.098 H 21.3°. Best body text is #FFFFFF at 13.19:1 contrast (WCAG AA passes).

Color values

HEX	#5B181C
RGB	rgb(91, 24, 28)
HSL	hsl(356, 58%, 23%)
HSV	hsv(356, 74%, 36%)
CMYK	cmyk(0%, 73.6%, 69.2%, 64.3%)
CIE-LAB	lab(19.89, 30.77, 14.86)
CIE-LCH	lch(19.89, 34.17, 25.78°)
OKLab	oklab(32.13% 0.0909 0.0354)
OKLCH	oklch(32.13% 0.098 21.3)
XYZ	xyz(4.8511, 2.9619, 1.4147)
Luminance	0.0296 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B181C #185B57

analogous

#5B183D #5B181C #5B3618

triadic

#5B181C #1C5B18 #181C5B

tetradic

#5B181C #3D5B18 #185B57 #36185B

square

#5B181C #3D5B18 #185B57 #36185B

split-complementary

#5B181C #185B36 #183D5B

monochromatic

#180607 #2B0B0D #5B181C #8B252B #BC323A

Accessibility & contrast

On white

13.19

#5B181C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#5B181C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B181C

13.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B181C	#FFFFFF	#000000	##FFFFFF
##5B181C	1.00	13.19	1.59	13.19
#FFFFFF	13.19	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271C

Deuteranopia (green-blind)

#3B351A

Tritanopia (blue-blind)

#64071A

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b181c;
/* rgb */ color: rgb(91, 24, 28);
/* oklch */ color: oklch(32.1% 0.098 21.3);

Tailwind

colors: {
  custom: {
    50: '#8f5a58',
    500: '#5b181c',
    950: '#000000',
  },
}

SCSS

$custom: #5b181c;
$custom-light: #8f5a58;
$custom-dark: #000000;

JSON

{
  "hex": "#5b181c",
  "rgb": {
    "r": 91,
    "g": 24,
    "b": 28
  },
  "hsl": {
    "h": 356.418,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.32131,
    "c": 0.09757,
    "h": 21.3
  },
  "luminance": 0.02961
}

Semantic roles & 50–950 ramp

primary

#5B181C

secondary

#3D928D

accent

#E1D846

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0D0403

muted

#7E7978

Preview Lab

Preview with #5B181C

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

Preview Lab → · Contrast checker → · Palette generator →