#37040C#37040C

#37040C is a very dark, moderate red. Relative luminance 0.009; OKLCH L 22.0% C 0.079 H 17.7°. Best body text is #FFFFFF at 17.72:1 contrast (WCAG AA passes).

Color values

HEX	#37040C
RGB	rgb(55, 4, 12)
HSL	hsl(351, 86%, 12%)
HSV	hsv(351, 93%, 22%)
CMYK	cmyk(0%, 92.7%, 78.2%, 78.4%)
CIE-LAB	lab(8.36, 25.39, 8.15)
CIE-LCH	lch(8.36, 26.67, 17.79°)
OKLab	oklab(21.99% 0.0755 0.0241)
OKLCH	oklch(21.99% 0.079 17.7)
XYZ	xyz(1.6855, 0.9259, 0.4377)
Luminance	0.0093 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37040C #04372F

analogous

#370426 #37040C #371604

triadic

#37040C #0C3704 #040C37

tetradic

#37040C #263704 #04372F #160437

square

#37040C #263704 #04372F #160437

split-complementary

#37040C #043716 #042637

monochromatic

#1D0206 #1D0206 #37040C #700818 #A90C25

Accessibility & contrast

On white

17.72

#37040C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#37040C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37040C

17.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37040C	#FFFFFF	#000000	##FFFFFF
##37040C	1.00	17.72	1.19	17.72
#FFFFFF	17.72	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#13110C

Deuteranopia (green-blind)

#201C0A

Tritanopia (blue-blind)

#3D0007

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #37040c;
/* rgb */ color: rgb(55, 4, 12);
/* oklch */ color: oklch(22.0% 0.079 17.7);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#37040c",
  "rgb": {
    "r": 55,
    "g": 4,
    "b": 12
  },
  "hsl": {
    "h": 350.588,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.21993,
    "c": 0.07922,
    "h": 17.7
  },
  "luminance": 0.00926
}

Semantic roles & 50–950 ramp

primary

#37040C

secondary

#1E796B

accent

#FDDC2B

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080101

muted

#7B7777

Preview Lab

Preview with #37040C

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

Preview Lab → · Contrast checker → · Palette generator →