#370B0A#370B0A

#370B0A is a very dark, moderate red. Relative luminance 0.011; OKLCH L 22.9% C 0.070 H 25.7°. Best body text is #FFFFFF at 17.29:1 contrast (WCAG AA passes).

Color values

HEX	#370B0A
RGB	rgb(55, 11, 10)
HSL	hsl(1, 69%, 13%)
HSV	hsv(1, 82%, 22%)
CMYK	cmyk(0%, 80%, 81.8%, 78.4%)
CIE-LAB	lab(9.59, 21.73, 10.78)
CIE-LCH	lch(9.59, 24.26, 26.39°)
OKLab	oklab(22.9% 0.0632 0.0305)
OKLCH	oklch(22.9% 0.07 25.7)
XYZ	xyz(1.7502, 1.0737, 0.4022)
Luminance	0.0107 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370B0A #0A3637

analogous

#370A20 #370B0A #37210A

triadic

#370B0A #0A370B #0B0A37

tetradic

#370B0A #20370A #0A3637 #210A37

square

#370B0A #20370A #0A3637 #210A37

split-complementary

#370B0A #0A3721 #0A2037

monochromatic

#1A0505 #1A0505 #370B0A #6B1513 #9F201D

Accessibility & contrast

On white

17.29

#370B0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#370B0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370B0A

17.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370B0A	#FFFFFF	#000000	##FFFFFF
##370B0A	1.00	17.29	1.21	17.29
#FFFFFF	17.29	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17150A

Deuteranopia (green-blind)

#221E09

Tritanopia (blue-blind)

#3D020B

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #370b0a;
/* rgb */ color: rgb(55, 11, 10);
/* oklch */ color: oklch(22.9% 0.070 25.7);

Tailwind

colors: {
  custom: {
    50: '#724d4b',
    500: '#370b0a',
    950: '#000000',
  },
}

SCSS

$custom: #370b0a;
$custom-light: #724d4b;
$custom-dark: #000000;

JSON

{
  "hex": "#370b0a",
  "rgb": {
    "r": 55,
    "g": 11,
    "b": 10
  },
  "hsl": {
    "h": 1.333,
    "s": 69.231,
    "l": 12.745
  },
  "oklch": {
    "l": 0.22897,
    "c": 0.07019,
    "h": 25.7
  },
  "luminance": 0.01073
}

Semantic roles & 50–950 ramp

primary

#370B0A

secondary

#287374

accent

#E8EC3C

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080101

muted

#7B7777

Preview Lab

Preview with #370B0A

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

Preview Lab → · Contrast checker → · Palette generator →