#37151B#37151B

#37151B is a very dark, muted red. Relative luminance 0.014; OKLCH L 24.9% C 0.055 H 10.9°. Best body text is #FFFFFF at 16.33:1 contrast (WCAG AA passes).

Color values

HEX	#37151B
RGB	rgb(55, 21, 27)
HSL	hsl(349, 45%, 15%)
HSV	hsv(349, 62%, 22%)
CMYK	cmyk(0%, 61.8%, 50.9%, 78.4%)
CIE-LAB	lab(12.14, 17.69, 3.95)
CIE-LCH	lch(12.14, 18.13, 12.60°)
OKLab	oklab(24.95% 0.0536 0.0103)
OKLCH	oklch(24.95% 0.055 10.9)
XYZ	xyz(2.0417, 1.4279, 1.2048)
Luminance	0.0143 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37151B #153731

analogous

#37152C #37151B #372015

triadic

#37151B #1B3715 #151B37

tetradic

#37151B #2C3715 #153731 #201537

square

#37151B #2C3715 #153731 #201537

split-complementary

#37151B #153720 #152C37

monochromatic

#16080B #16080B #37151B #632631 #903746

Accessibility & contrast

On white

16.33

#37151B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#37151B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37151B

16.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37151B	#FFFFFF	#000000	##FFFFFF
##37151B	1.00	16.33	1.29	16.33
#FFFFFF	16.33	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C1C1B

Deuteranopia (green-blind)

#24221A

Tritanopia (blue-blind)

#3C1117

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #37151b;
/* rgb */ color: rgb(55, 21, 27);
/* oklch */ color: oklch(24.9% 0.055 10.9);

Tailwind

colors: {
  custom: {
    50: '#705357',
    500: '#37151b',
    950: '#000000',
  },
}

SCSS

$custom: #37151b;
$custom-light: #705357;
$custom-dark: #000000;

JSON

{
  "hex": "#37151b",
  "rgb": {
    "r": 55,
    "g": 21,
    "b": 27
  },
  "hsl": {
    "h": 349.412,
    "s": 44.737,
    "l": 14.902
  },
  "oklch": {
    "l": 0.24948,
    "c": 0.0546,
    "h": 10.9
  },
  "luminance": 0.01428
}

Semantic roles & 50–950 ramp

primary

#37151B

secondary

#3A6E65

accent

#D4BE53

background

#F6F4F5

surface

#ECE7E9

border

#C7C3C5

text

#080203

muted

#7B7878

Preview Lab

Preview with #37151B

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

Preview Lab → · Contrast checker → · Palette generator →