#5B151B#5B151B

#5B151B is a dark, moderate red. Relative luminance 0.028; OKLCH L 31.8% C 0.101 H 20.5°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#5B151B
RGB	rgb(91, 21, 27)
HSL	hsl(355, 63%, 22%)
HSV	hsv(355, 77%, 36%)
CMYK	cmyk(0%, 76.9%, 70.3%, 64.3%)
CIE-LAB	lab(19.39, 32.02, 14.92)
CIE-LCH	lch(19.39, 35.32, 24.99°)
OKLab	oklab(31.75% 0.0947 0.0354)
OKLCH	oklch(31.75% 0.101 20.5)
XYZ	xyz(4.7809, 2.8403, 1.3332)
Luminance	0.0284 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B151B #155B55

analogous

#5B153E #5B151B #5B3215

triadic

#5B151B #1B5B15 #151B5B

tetradic

#5B151B #3E5B15 #155B55 #32155B

square

#5B151B #3E5B15 #155B55 #32155B

split-complementary

#5B151B #155B32 #153E5B

monochromatic

#190607 #290A0C #5B151B #8D202A #BE2C39

Accessibility & contrast

On white

13.39

#5B151B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#5B151B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B151B

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B151B	#FFFFFF	#000000	##FFFFFF
##5B151B	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28261B

Deuteranopia (green-blind)

#3A3419

Tritanopia (blue-blind)

#650118

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #5b151b;
/* rgb */ color: rgb(91, 21, 27);
/* oklch */ color: oklch(31.8% 0.101 20.5);

Tailwind

colors: {
  custom: {
    50: '#8f5857',
    500: '#5b151b',
    950: '#000000',
  },
}

SCSS

$custom: #5b151b;
$custom-light: #8f5857;
$custom-dark: #000000;

JSON

{
  "hex": "#5b151b",
  "rgb": {
    "r": 91,
    "g": 21,
    "b": 27
  },
  "hsl": {
    "h": 354.857,
    "s": 62.5,
    "l": 21.961
  },
  "oklch": {
    "l": 0.31753,
    "c": 0.10107,
    "h": 20.5
  },
  "luminance": 0.0284
}

Semantic roles & 50–950 ramp

primary

#5B151B

secondary

#39928B

accent

#E6D842

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0D0403

muted

#7E7978

Preview Lab

Preview with #5B151B

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

Preview Lab → · Contrast checker → · Palette generator →