#5B181A#5B181A

#5B181A is a dark, moderate red. Relative luminance 0.030; OKLCH L 32.1% C 0.098 H 23.0°. Best body text is #FFFFFF at 13.20:1 contrast (WCAG AA passes).

Color values

HEX	#5B181A
RGB	rgb(91, 24, 26)
HSL	hsl(358, 58%, 23%)
HSV	hsv(358, 74%, 36%)
CMYK	cmyk(0%, 73.6%, 71.4%, 64.3%)
CIE-LAB	lab(19.85, 30.63, 16.19)
CIE-LCH	lch(19.85, 34.65, 27.86°)
OKLab	oklab(32.09% 0.09 0.0381)
OKLCH	oklch(32.09% 0.098 23)
XYZ	xyz(4.8280, 2.9527, 1.2928)
Luminance	0.0295 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B181A #185B59

analogous

#5B183B #5B181A #5B3718

triadic

#5B181A #1A5B18 #181A5B

tetradic

#5B181A #3B5B18 #185B59 #37185B

square

#5B181A #3B5B18 #185B59 #37185B

split-complementary

#5B181A #185B37 #183B5B

monochromatic

#180607 #2B0B0C #5B181A #8B2528 #BC3236

Accessibility & contrast

On white

13.20

#5B181A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#5B181A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B181A

13.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B181A	#FFFFFF	#000000	##FFFFFF
##5B181A	1.00	13.20	1.59	13.20
#FFFFFF	13.20	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A2719

Deuteranopia (green-blind)

#3B3518

Tritanopia (blue-blind)

#650619

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b181a;
/* rgb */ color: rgb(91, 24, 26);
/* oklch */ color: oklch(32.1% 0.098 23.0);

Tailwind

colors: {
  custom: {
    50: '#8f5a56',
    500: '#5b181a',
    950: '#000000',
  },
}

SCSS

$custom: #5b181a;
$custom-light: #8f5a56;
$custom-dark: #000000;

JSON

{
  "hex": "#5b181a",
  "rgb": {
    "r": 91,
    "g": 24,
    "b": 26
  },
  "hsl": {
    "h": 358.209,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.32091,
    "c": 0.09777,
    "h": 23
  },
  "luminance": 0.02952
}

Semantic roles & 50–950 ramp

primary

#5B181A

secondary

#3D928F

accent

#E1DD46

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0D0403

muted

#7E7978

Preview Lab

Preview with #5B181A

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

Preview Lab → · Contrast checker → · Palette generator →