#37040E#37040E

#37040E is a very dark, moderate red. Relative luminance 0.009; OKLCH L 22.0% C 0.079 H 15.4°. Best body text is #FFFFFF at 17.70:1 contrast (WCAG AA passes).

Color values

HEX	#37040E
RGB	rgb(55, 4, 14)
HSL	hsl(348, 86%, 12%)
HSV	hsv(348, 93%, 22%)
CMYK	cmyk(0%, 92.7%, 74.5%, 78.4%)
CIE-LAB	lab(8.40, 25.53, 7.25)
CIE-LCH	lch(8.40, 26.54, 15.86°)
OKLab	oklab(22.04% 0.0764 0.021)
OKLCH	oklch(22.04% 0.079 15.4)
XYZ	xyz(1.6984, 0.9310, 0.5057)
Luminance	0.0093 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37040E #04372D

analogous

#370428 #37040E #371404

triadic

#37040E #0E3704 #040E37

tetradic

#37040E #283704 #04372D #140437

square

#37040E #283704 #04372D #140437

split-complementary

#37040E #043714 #042837

monochromatic

#1D0207 #1D0207 #37040E #70081D #A90C2B

Accessibility & contrast

On white

17.70

#37040E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#37040E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37040E

17.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37040E	#FFFFFF	#000000	##FFFFFF
##37040E	1.00	17.70	1.19	17.70
#FFFFFF	17.70	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12110E

Deuteranopia (green-blind)

#201C0D

Tritanopia (blue-blind)

#3D0008

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #37040e;
/* rgb */ color: rgb(55, 4, 14);
/* oklch */ color: oklch(22.0% 0.079 15.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#37040e",
  "rgb": {
    "r": 55,
    "g": 4,
    "b": 14
  },
  "hsl": {
    "h": 348.235,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.22041,
    "c": 0.07926,
    "h": 15.4
  },
  "luminance": 0.00931
}

Semantic roles & 50–950 ramp

primary

#37040E

secondary

#1E7967

accent

#FDD42B

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080101

muted

#7B7777

Preview Lab

Preview with #37040E

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

Preview Lab → · Contrast checker → · Palette generator →