#55181B#55181B

#55181B is a dark, moderate red. Relative luminance 0.027; OKLCH L 31.0% C 0.090 H 21.4°. Best body text is #FFFFFF at 13.70:1 contrast (WCAG AA passes).

Color values

HEX	#55181B
RGB	rgb(85, 24, 27)
HSL	hsl(357, 56%, 21%)
HSV	hsv(357, 72%, 33%)
CMYK	cmyk(0%, 71.8%, 68.2%, 66.7%)
CIE-LAB	lab(18.65, 28.43, 13.72)
CIE-LCH	lch(18.65, 31.56, 25.76°)
OKLab	oklab(30.97% 0.0841 0.0329)
OKLCH	oklch(30.97% 0.09 21.4)
XYZ	xyz(4.2712, 2.6643, 1.3260)
Luminance	0.0266 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#55181B #185552

analogous

#55183A #55181B #553418

triadic

#55181B #1B5518 #181B55

tetradic

#55181B #3A5518 #185552 #341855

square

#55181B #3A5518 #185552 #341855

split-complementary

#55181B #185534 #183A55

monochromatic

#180708 #250B0C #55181B #85252A #B43339

Accessibility & contrast

On white

13.70

#55181B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#55181B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #55181B

13.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##55181B	#FFFFFF	#000000	##FFFFFF
##55181B	1.00	13.70	1.53	13.70
#FFFFFF	13.70	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28251B

Deuteranopia (green-blind)

#373219

Tritanopia (blue-blind)

#5E0A1A

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #55181b;
/* rgb */ color: rgb(85, 24, 27);
/* oklch */ color: oklch(31.0% 0.090 21.4);

Tailwind

colors: {
  custom: {
    50: '#8a5957',
    500: '#55181b',
    950: '#000000',
  },
}

SCSS

$custom: #55181b;
$custom-light: #8a5957;
$custom-dark: #000000;

JSON

{
  "hex": "#55181b",
  "rgb": {
    "r": 85,
    "g": 24,
    "b": 27
  },
  "hsl": {
    "h": 357.049,
    "s": 55.963,
    "l": 21.373
  },
  "oklch": {
    "l": 0.30966,
    "c": 0.09032,
    "h": 21.4
  },
  "luminance": 0.02664
}

Semantic roles & 50–950 ramp

primary

#55181B

secondary

#3D8C88

accent

#DFD849

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0403

muted

#7D7978

Preview Lab

Preview with #55181B

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

Preview Lab → · Contrast checker → · Palette generator →