#5B180E#5B180E

#5B180E is a dark, moderate red. Relative luminance 0.029; OKLCH L 31.9% C 0.100 H 31.4°. Best body text is #FFFFFF at 13.28:1 contrast (WCAG AA passes).

Color values

HEX	#5B180E
RGB	rgb(91, 24, 14)
HSL	hsl(8, 73%, 21%)
HSV	hsv(8, 85%, 36%)
CMYK	cmyk(0%, 73.6%, 84.6%, 64.3%)
CIE-LAB	lab(19.68, 30.00, 23.51)
CIE-LCH	lch(19.68, 38.12, 38.08°)
OKLab	oklab(31.91% 0.0853 0.052)
OKLCH	oklch(31.91% 0.1 31.4)
XYZ	xyz(4.7208, 2.9098, 0.7285)
Luminance	0.0291 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B180E #0E515B

analogous

#5B0E2A #5B180E #5B3E0E

triadic

#5B180E #0E5B18 #180E5B

tetradic

#5B180E #2A5B0E #0E515B #3E0E5B

square

#5B180E #2A5B0E #0E515B #3E0E5B

split-complementary

#5B180E #0E5B3E #0E2A5B

monochromatic

#1B0704 #260A06 #5B180E #902616 #C5341E

Accessibility & contrast

On white

13.28

#5B180E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#5B180E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #5B180E

13.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B180E	#FFFFFF	#000000	##FFFFFF
##5B180E	1.00	13.28	1.58	13.28
#FFFFFF	13.28	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B260C

Deuteranopia (green-blind)

#3C350B

Tritanopia (blue-blind)

#650316

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #5b180e;
/* rgb */ color: rgb(91, 24, 14);
/* oklch */ color: oklch(31.9% 0.100 31.4);

Tailwind

colors: {
  custom: {
    50: '#90594d',
    500: '#5b180e',
    950: '#000000',
  },
}

SCSS

$custom: #5b180e;
$custom-light: #90594d;
$custom-dark: #000000;

JSON

{
  "hex": "#5b180e",
  "rgb": {
    "r": 91,
    "g": 24,
    "b": 14
  },
  "hsl": {
    "h": 7.792,
    "s": 73.333,
    "l": 20.588
  },
  "oklch": {
    "l": 0.31905,
    "c": 0.09985,
    "h": 31.4
  },
  "luminance": 0.02909
}

Semantic roles & 50–950 ramp

primary

#5B180E

secondary

#308895

accent

#D8F038

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0E0401

muted

#7E7977

Preview Lab

Preview with #5B180E

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

Preview Lab → · Contrast checker → · Palette generator →