#370D0A#370D0A

#370D0A is a very dark, moderate red. Relative luminance 0.011; OKLCH L 23.2% C 0.068 H 27.7°. Best body text is #FFFFFF at 17.15:1 contrast (WCAG AA passes).

Color values

HEX	#370D0A
RGB	rgb(55, 13, 10)
HSL	hsl(4, 69%, 13%)
HSV	hsv(4, 82%, 22%)
CMYK	cmyk(0%, 76.4%, 81.8%, 78.4%)
CIE-LAB	lab(9.97, 20.70, 11.32)
CIE-LCH	lch(9.97, 23.59, 28.68°)
OKLab	oklab(23.18% 0.06 0.0314)
OKLCH	oklch(23.18% 0.068 27.7)
XYZ	xyz(1.7744, 1.1222, 0.4103)
Luminance	0.0112 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370D0A #0A3437

analogous

#370A1D #370D0A #37230A

triadic

#370D0A #0A370D #0D0A37

tetradic

#370D0A #1D370A #0A3437 #230A37

square

#370D0A #1D370A #0A3437 #230A37

split-complementary

#370D0A #0A3723 #0A1D37

monochromatic

#1A0605 #1A0605 #370D0A #6B1913 #9F251D

Accessibility & contrast

On white

17.15

#370D0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#370D0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370D0A

17.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370D0A	#FFFFFF	#000000	##FFFFFF
##370D0A	1.00	17.15	1.22	17.15
#FFFFFF	17.15	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#191609

Deuteranopia (green-blind)

#231F09

Tritanopia (blue-blind)

#3D040D

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #370d0a;
/* rgb */ color: rgb(55, 13, 10);
/* oklch */ color: oklch(23.2% 0.068 27.7);

Tailwind

colors: {
  custom: {
    50: '#724e4b',
    500: '#370d0a',
    950: '#000000',
  },
}

SCSS

$custom: #370d0a;
$custom-light: #724e4b;
$custom-dark: #000000;

JSON

{
  "hex": "#370d0a",
  "rgb": {
    "r": 55,
    "g": 13,
    "b": 10
  },
  "hsl": {
    "h": 4,
    "s": 69.231,
    "l": 12.745
  },
  "oklch": {
    "l": 0.23182,
    "c": 0.06773,
    "h": 27.7
  },
  "luminance": 0.01122
}

Semantic roles & 50–950 ramp

primary

#370D0A

secondary

#286F74

accent

#E0EC3C

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080201

muted

#7B7877

Preview Lab

Preview with #370D0A

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

Preview Lab → · Contrast checker → · Palette generator →