#370B0D#370B0D

#370B0D is a very dark, moderate red. Relative luminance 0.011; OKLCH L 23.0% C 0.070 H 22.1°. Best body text is #FFFFFF at 17.27:1 contrast (WCAG AA passes).

Color values

HEX	#370B0D
RGB	rgb(55, 11, 13)
HSL	hsl(357, 67%, 13%)
HSV	hsv(357, 80%, 22%)
CMYK	cmyk(0%, 80%, 76.4%, 78.4%)
CIE-LAB	lab(9.65, 21.93, 9.54)
CIE-LCH	lch(9.65, 23.91, 23.50°)
OKLab	oklab(22.96% 0.0646 0.0262)
OKLCH	oklch(22.96% 0.07 22.1)
XYZ	xyz(1.7680, 1.0809, 0.4962)
Luminance	0.0108 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370B0D #0B3735

analogous

#370B23 #370B0D #371F0B

triadic

#370B0D #0D370B #0B0D37

tetradic

#370B0D #23370B #0B3735 #1F0B37

square

#370B0D #23370B #0B3735 #1F0B37

split-complementary

#370B0D #0B371F #0B2337

monochromatic

#1A0506 #1A0506 #370B0D #6A1519 #9D1F25

Accessibility & contrast

On white

17.27

#370B0D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#370B0D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370B0D

17.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370B0D	#FFFFFF	#000000	##FFFFFF
##370B0D	1.00	17.27	1.22	17.27
#FFFFFF	17.27	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17150D

Deuteranopia (green-blind)

#221E0C

Tritanopia (blue-blind)

#3D020C

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #370b0d;
/* rgb */ color: rgb(55, 11, 13);
/* oklch */ color: oklch(23.0% 0.070 22.1);

Tailwind

colors: {
  custom: {
    50: '#724d4c',
    500: '#370b0d',
    950: '#000000',
  },
}

SCSS

$custom: #370b0d;
$custom-light: #724d4c;
$custom-dark: #000000;

JSON

{
  "hex": "#370b0d",
  "rgb": {
    "r": 55,
    "g": 11,
    "b": 13
  },
  "hsl": {
    "h": 357.273,
    "s": 66.667,
    "l": 12.941
  },
  "oklch": {
    "l": 0.22958,
    "c": 0.06976,
    "h": 22.1
  },
  "luminance": 0.01081
}

Semantic roles & 50–950 ramp

primary

#370B0D

secondary

#2A7470

accent

#EAE23E

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080101

muted

#7B7777

Preview Lab

Preview with #370B0D

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

Preview Lab → · Contrast checker → · Palette generator →