#370D0B#370D0B

#370D0B is a very dark, moderate red. Relative luminance 0.011; OKLCH L 23.2% C 0.068 H 26.5°. Best body text is #FFFFFF at 17.15:1 contrast (WCAG AA passes).

Color values

HEX	#370D0B
RGB	rgb(55, 13, 11)
HSL	hsl(3, 67%, 13%)
HSV	hsv(3, 80%, 22%)
CMYK	cmyk(0%, 76.4%, 80%, 78.4%)
CIE-LAB	lab(9.99, 20.76, 10.93)
CIE-LCH	lch(9.99, 23.46, 27.76°)
OKLab	oklab(23.2% 0.0605 0.0301)
OKLCH	oklch(23.2% 0.068 26.5)
XYZ	xyz(1.7801, 1.1245, 0.4399)
Luminance	0.0112 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370D0B #0B3537

analogous

#370B1F #370D0B #37230B

triadic

#370D0B #0B370D #0D0B37

tetradic

#370D0B #1F370B #0B3537 #230B37

square

#370D0B #1F370B #0B3537 #230B37

split-complementary

#370D0B #0B3723 #0B1F37

monochromatic

#1A0605 #1A0605 #370D0B #6A1915 #9D251F

Accessibility & contrast

On white

17.15

#370D0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#370D0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370D0B

17.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370D0B	#FFFFFF	#000000	##FFFFFF
##370D0B	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)

#18160A

Deuteranopia (green-blind)

#231F0A

Tritanopia (blue-blind)

#3D040D

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #370d0b;
/* rgb */ color: rgb(55, 13, 11);
/* oklch */ color: oklch(23.2% 0.068 26.5);

Tailwind

colors: {
  custom: {
    50: '#724e4b',
    500: '#370d0b',
    950: '#000000',
  },
}

SCSS

$custom: #370d0b;
$custom-light: #724e4b;
$custom-dark: #000000;

JSON

{
  "hex": "#370d0b",
  "rgb": {
    "r": 55,
    "g": 13,
    "b": 11
  },
  "hsl": {
    "h": 2.727,
    "s": 66.667,
    "l": 12.941
  },
  "oklch": {
    "l": 0.23201,
    "c": 0.06753,
    "h": 26.5
  },
  "luminance": 0.01124
}

Semantic roles & 50–950 ramp

primary

#370D0B

secondary

#2A7074

accent

#E2EA3E

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080201

muted

#7B7877

Preview Lab

Preview with #370D0B

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

Preview Lab → · Contrast checker → · Palette generator →