#5B171B#5B171B

#5B171B is a dark, moderate red. Relative luminance 0.029; OKLCH L 32.0% C 0.099 H 21.6°. Best body text is #FFFFFF at 13.26:1 contrast (WCAG AA passes).

Color values

HEX	#5B171B
RGB	rgb(91, 23, 27)
HSL	hsl(356, 60%, 22%)
HSV	hsv(356, 75%, 36%)
CMYK	cmyk(0%, 74.7%, 70.3%, 64.3%)
CIE-LAB	lab(19.71, 31.15, 15.32)
CIE-LCH	lch(19.71, 34.71, 26.19°)
OKLab	oklab(31.99% 0.0919 0.0363)
OKLCH	oklch(31.99% 0.099 21.6)
XYZ	xyz(4.8191, 2.9168, 1.3459)
Luminance	0.0292 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B171B #175B57

analogous

#5B173D #5B171B #5B3517

triadic

#5B171B #1B5B17 #171B5B

tetradic

#5B171B #3D5B17 #175B57 #35175B

square

#5B171B #3D5B17 #175B57 #35175B

split-complementary

#5B171B #175B35 #173D5B

monochromatic

#180607 #2A0B0D #5B171B #8C2329 #BD3038

Accessibility & contrast

On white

13.26

#5B171B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#5B171B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B171B

13.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B171B	#FFFFFF	#000000	##FFFFFF
##5B171B	1.00	13.26	1.58	13.26
#FFFFFF	13.26	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A261B

Deuteranopia (green-blind)

#3B3519

Tritanopia (blue-blind)

#640519

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b171b;
/* rgb */ color: rgb(91, 23, 27);
/* oklch */ color: oklch(32.0% 0.099 21.6);

Tailwind

colors: {
  custom: {
    50: '#8f5957',
    500: '#5b171b',
    950: '#000000',
  },
}

SCSS

$custom: #5b171b;
$custom-light: #8f5957;
$custom-dark: #000000;

JSON

{
  "hex": "#5b171b",
  "rgb": {
    "r": 91,
    "g": 23,
    "b": 27
  },
  "hsl": {
    "h": 356.471,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.31988,
    "c": 0.09882,
    "h": 21.6
  },
  "luminance": 0.02916
}

Semantic roles & 50–950 ramp

primary

#5B171B

secondary

#3C928D

accent

#E3DA45

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0D0403

muted

#7E7978

Preview Lab

Preview with #5B171B

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

Preview Lab → · Contrast checker → · Palette generator →