#5B181E#5B181E

#5B181E is a dark, moderate red. Relative luminance 0.030; OKLCH L 32.2% C 0.097 H 19.6°. Best body text is #FFFFFF at 13.17:1 contrast (WCAG AA passes).

Color values

HEX	#5B181E
RGB	rgb(91, 24, 30)
HSL	hsl(355, 58%, 23%)
HSV	hsv(355, 74%, 36%)
CMYK	cmyk(0%, 73.6%, 67%, 64.3%)
CIE-LAB	lab(19.93, 30.91, 13.53)
CIE-LCH	lch(19.93, 33.74, 23.64°)
OKLab	oklab(32.17% 0.0918 0.0326)
OKLCH	oklch(32.17% 0.097 19.6)
XYZ	xyz(4.8758, 2.9718, 1.5449)
Luminance	0.0297 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B181E #185B55

analogous

#5B183F #5B181E #5B3418

triadic

#5B181E #1E5B18 #181E5B

tetradic

#5B181E #3F5B18 #185B55 #34185B

square

#5B181E #3F5B18 #185B55 #34185B

split-complementary

#5B181E #185B34 #183F5B

monochromatic

#180608 #2B0B0E #5B181E #8B252E #BC323E

Accessibility & contrast

On white

13.17

#5B181E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#5B181E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B181E

13.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B181E	#FFFFFF	#000000	##FFFFFF
##5B181E	1.00	13.17	1.59	13.17
#FFFFFF	13.17	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271E

Deuteranopia (green-blind)

#3B351C

Tritanopia (blue-blind)

#64071B

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b181e;
/* rgb */ color: rgb(91, 24, 30);
/* oklch */ color: oklch(32.2% 0.097 19.6);

Tailwind

colors: {
  custom: {
    50: '#8f5a59',
    500: '#5b181e',
    950: '#000000',
  },
}

SCSS

$custom: #5b181e;
$custom-light: #8f5a59;
$custom-dark: #000000;

JSON

{
  "hex": "#5b181e",
  "rgb": {
    "r": 91,
    "g": 24,
    "b": 30
  },
  "hsl": {
    "h": 354.627,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.32174,
    "c": 0.09743,
    "h": 19.6
  },
  "luminance": 0.02971
}

Semantic roles & 50–950 ramp

primary

#5B181E

secondary

#3D928A

accent

#E1D446

background

#F9F5F5

surface

#F1E9E9

border

#CBC5C5

text

#0D0403

muted

#7E7978

Preview Lab

Preview with #5B181E

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

Preview Lab → · Contrast checker → · Palette generator →