#37040D#37040D

#37040D is a very dark, moderate red. Relative luminance 0.009; OKLCH L 22.0% C 0.079 H 16.6°. Best body text is #FFFFFF at 17.71:1 contrast (WCAG AA passes).

Color values

HEX	#37040D
RGB	rgb(55, 4, 13)
HSL	hsl(349, 86%, 12%)
HSV	hsv(349, 93%, 22%)
CMYK	cmyk(0%, 92.7%, 76.4%, 78.4%)
CIE-LAB	lab(8.38, 25.46, 7.71)
CIE-LCH	lch(8.38, 26.61, 16.86°)
OKLab	oklab(22.02% 0.0759 0.0226)
OKLCH	oklch(22.02% 0.079 16.6)
XYZ	xyz(1.6918, 0.9284, 0.4708)
Luminance	0.0093 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37040D #04372E

analogous

#370427 #37040D #371504

triadic

#37040D #0D3704 #040D37

tetradic

#37040D #273704 #04372E #150437

square

#37040D #273704 #04372E #150437

split-complementary

#37040D #043715 #042737

monochromatic

#1D0207 #1D0207 #37040D #70081A #A90C28

Accessibility & contrast

On white

17.71

#37040D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#37040D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37040D

17.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37040D	#FFFFFF	#000000	##FFFFFF
##37040D	1.00	17.71	1.19	17.71
#FFFFFF	17.71	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12110D

Deuteranopia (green-blind)

#201C0B

Tritanopia (blue-blind)

#3D0007

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #37040d;
/* rgb */ color: rgb(55, 4, 13);
/* oklch */ color: oklch(22.0% 0.079 16.6);

Tailwind

colors: {
  custom: {
    50: '#72494c',
    500: '#37040d',
    950: '#000000',
  },
}

SCSS

$custom: #37040d;
$custom-light: #72494c;
$custom-dark: #000000;

JSON

{
  "hex": "#37040d",
  "rgb": {
    "r": 55,
    "g": 4,
    "b": 13
  },
  "hsl": {
    "h": 349.412,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.22016,
    "c": 0.07922,
    "h": 16.6
  },
  "luminance": 0.00928
}

Semantic roles & 50–950 ramp

primary

#37040D

secondary

#1E7969

accent

#FDD82B

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080101

muted

#7B7777

Preview Lab

Preview with #37040D

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

Preview Lab → · Contrast checker → · Palette generator →