#851B21#851B21

#851B21 is a dark, vivid red. Relative luminance 0.059; OKLCH L 40.6% C 0.141 H 23.5°. Best body text is #FFFFFF at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#851B21
RGB	rgb(133, 27, 33)
HSL	hsl(357, 66%, 31%)
HSV	hsv(357, 80%, 52%)
CMYK	cmyk(0%, 79.7%, 75.2%, 47.8%)
CIE-LAB	lab(29.11, 44.24, 24.75)
CIE-LCH	lch(29.11, 50.70, 29.23°)
OKLab	oklab(40.61% 0.129 0.0562)
OKLCH	oklch(40.61% 0.141 23.5)
XYZ	xyz(10.3405, 5.8818, 2.0294)
Luminance	0.0588 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#851B21 #1B857F

analogous

#851B56 #851B21 #854A1B

triadic

#851B21 #21851B #1B2185

tetradic

#851B21 #56851B #1B857F #4A1B85

square

#851B21 #56851B #1B857F #4A1B85

split-complementary

#851B21 #1B854A #1B5685

monochromatic

#1F0608 #521114 #851B21 #B8252E #D9424A

Accessibility & contrast

On white

9.65

#851B21 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#851B21 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #851B21

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##851B21	#FFFFFF	#000000	##FFFFFF
##851B21	1.00	9.65	2.18	9.65
#FFFFFF	9.65	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B3620

Deuteranopia (green-blind)

#564D1D

Tritanopia (blue-blind)

#93001E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #851b21;
/* rgb */ color: rgb(133, 27, 33);
/* oklch */ color: oklch(40.6% 0.141 23.5);

Tailwind

colors: {
  custom: {
    50: '#b0625c',
    500: '#851b21',
    950: '#000000',
  },
}

SCSS

$custom: #851b21;
$custom-light: #b0625c;
$custom-dark: #000000;

JSON

{
  "hex": "#851b21",
  "rgb": {
    "r": 133,
    "g": 27,
    "b": 33
  },
  "hsl": {
    "h": 356.604,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.40605,
    "c": 0.14066,
    "h": 23.5
  },
  "luminance": 0.0588
}

Semantic roles & 50–950 ramp

primary

#851B21

secondary

#44B8B2

accent

#E9E03F

background

#FBF6F5

surface

#F6EBE9

border

#D0C6C5

text

#120604

muted

#817A79

Preview Lab

Preview with #851B21

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

Preview Lab → · Contrast checker → · Palette generator →