#51181B#51181B

#51181B is a dark, moderate red. Relative luminance 0.025; OKLCH L 30.2% C 0.085 H 20.8°. Best body text is #FFFFFF at 14.03:1 contrast (WCAG AA passes).

Color values

HEX	#51181B
RGB	rgb(81, 24, 27)
HSL	hsl(357, 54%, 21%)
HSV	hsv(357, 70%, 32%)
CMYK	cmyk(0%, 70.4%, 66.7%, 68.2%)
CIE-LAB	lab(17.84, 26.87, 12.52)
CIE-LCH	lch(17.84, 29.64, 24.98°)
OKLab	oklab(30.21% 0.0797 0.0303)
OKLCH	oklch(30.21% 0.085 20.8)
XYZ	xyz(3.9182, 2.4823, 1.3095)
Luminance	0.0248 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51181B #18514E

analogous

#511837 #51181B #513118

triadic

#51181B #1B5118 #181B51

tetradic

#51181B #375118 #18514E #311851

square

#51181B #375118 #18514E #311851

split-complementary

#51181B #185131 #183751

monochromatic

#180708 #220A0B #51181B #80262B #AF343A

Accessibility & contrast

On white

14.03

#51181B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#51181B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #51181B

14.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51181B	#FFFFFF	#000000	##FFFFFF
##51181B	1.00	14.03	1.50	14.03
#FFFFFF	14.03	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27241B

Deuteranopia (green-blind)

#35301A

Tritanopia (blue-blind)

#590C1A

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #51181b;
/* rgb */ color: rgb(81, 24, 27);
/* oklch */ color: oklch(30.2% 0.085 20.8);

Tailwind

colors: {
  custom: {
    50: '#865857',
    500: '#51181b',
    950: '#000000',
  },
}

SCSS

$custom: #51181b;
$custom-light: #865857;
$custom-dark: #000000;

JSON

{
  "hex": "#51181b",
  "rgb": {
    "r": 81,
    "g": 24,
    "b": 27
  },
  "hsl": {
    "h": 356.842,
    "s": 54.286,
    "l": 20.588
  },
  "oklch": {
    "l": 0.30209,
    "c": 0.08528,
    "h": 20.8
  },
  "luminance": 0.02482
}

Semantic roles & 50–950 ramp

primary

#51181B

secondary

#3D8884

accent

#DED64A

background

#F8F5F5

surface

#F0E9E9

border

#CBC5C5

text

#0C0303

muted

#7D7878

Preview Lab

Preview with #51181B

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

Preview Lab → · Contrast checker → · Palette generator →