#5B181F#5B181F

#5B181F is a dark, moderate red. Relative luminance 0.030; OKLCH L 32.2% C 0.097 H 18.7°. Best body text is #FFFFFF at 13.16:1 contrast (WCAG AA passes).

Color values

HEX	#5B181F
RGB	rgb(91, 24, 31)
HSL	hsl(354, 58%, 23%)
HSV	hsv(354, 74%, 36%)
CMYK	cmyk(0%, 73.6%, 65.9%, 64.3%)
CIE-LAB	lab(19.95, 30.98, 12.86)
CIE-LCH	lch(19.95, 33.55, 22.55°)
OKLab	oklab(32.2% 0.0923 0.0312)
OKLCH	oklch(32.2% 0.097 18.7)
XYZ	xyz(4.8888, 2.9770, 1.6132)
Luminance	0.0298 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B181F #185B54

analogous

#5B1841 #5B181F #5B3218

triadic

#5B181F #1F5B18 #181F5B

tetradic

#5B181F #415B18 #185B54 #32185B

square

#5B181F #415B18 #185B54 #32185B

split-complementary

#5B181F #185B32 #18415B

monochromatic

#180608 #2B0B0F #5B181F #8B252F #BC3240

Accessibility & contrast

On white

13.16

#5B181F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#5B181F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B181F

13.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B181F	#FFFFFF	#000000	##FFFFFF
##5B181F	1.00	13.16	1.60	13.16
#FFFFFF	13.16	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271F

Deuteranopia (green-blind)

#3B351D

Tritanopia (blue-blind)

#64081B

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b181f;
/* rgb */ color: rgb(91, 24, 31);
/* oklch */ color: oklch(32.2% 0.097 18.7);

Tailwind

colors: {
  custom: {
    50: '#8e5a5a',
    500: '#5b181f',
    950: '#000000',
  },
}

SCSS

$custom: #5b181f;
$custom-light: #8e5a5a;
$custom-dark: #000000;

JSON

{
  "hex": "#5b181f",
  "rgb": {
    "r": 91,
    "g": 24,
    "b": 31
  },
  "hsl": {
    "h": 353.731,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.32196,
    "c": 0.09738,
    "h": 18.7
  },
  "luminance": 0.02976
}

Semantic roles & 50–950 ramp

primary

#5B181F

secondary

#3D9289

accent

#E1D146

background

#F9F5F5

surface

#F1E9E9

border

#CBC5C5

text

#0D0403

muted

#7E7978

Preview Lab

Preview with #5B181F

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

Preview Lab → · Contrast checker → · Palette generator →