#5B181D#5B181D

#5B181D is a dark, moderate red. Relative luminance 0.030; OKLCH L 32.2% C 0.097 H 20.4°. Best body text is #FFFFFF at 13.18:1 contrast (WCAG AA passes).

Color values

HEX	#5B181D
RGB	rgb(91, 24, 29)
HSL	hsl(356, 58%, 23%)
HSV	hsv(356, 74%, 36%)
CMYK	cmyk(0%, 73.6%, 68.1%, 64.3%)
CIE-LAB	lab(19.91, 30.84, 14.20)
CIE-LCH	lch(19.91, 33.95, 24.72°)
OKLab	oklab(32.15% 0.0914 0.034)
OKLCH	oklch(32.15% 0.097 20.4)
XYZ	xyz(4.8633, 2.9668, 1.4787)
Luminance	0.0297 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B181D #185B56

analogous

#5B183F #5B181D #5B3418

triadic

#5B181D #1D5B18 #181D5B

tetradic

#5B181D #3F5B18 #185B56 #34185B

square

#5B181D #3F5B18 #185B56 #34185B

split-complementary

#5B181D #185B34 #183F5B

monochromatic

#180608 #2B0B0E #5B181D #8B252C #BC323C

Accessibility & contrast

On white

13.18

#5B181D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#5B181D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B181D

13.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B181D	#FFFFFF	#000000	##FFFFFF
##5B181D	1.00	13.18	1.59	13.18
#FFFFFF	13.18	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271D

Deuteranopia (green-blind)

#3B351B

Tritanopia (blue-blind)

#64071A

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b181d;
/* rgb */ color: rgb(91, 24, 29);
/* oklch */ color: oklch(32.2% 0.097 20.4);

Tailwind

colors: {
  custom: {
    50: '#8f5a58',
    500: '#5b181d',
    950: '#000000',
  },
}

SCSS

$custom: #5b181d;
$custom-light: #8f5a58;
$custom-dark: #000000;

JSON

{
  "hex": "#5b181d",
  "rgb": {
    "r": 91,
    "g": 24,
    "b": 29
  },
  "hsl": {
    "h": 355.522,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.32152,
    "c": 0.09749,
    "h": 20.4
  },
  "luminance": 0.02966
}

Semantic roles & 50–950 ramp

primary

#5B181D

secondary

#3D928B

accent

#E1D646

background

#F9F5F5

surface

#F1E9E9

border

#CBC5C5

text

#0D0403

muted

#7E7978

Preview Lab

Preview with #5B181D

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

Preview Lab → · Contrast checker → · Palette generator →