#37100D#37100D

#37100D is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.7% C 0.063 H 27.3°. Best body text is #FFFFFF at 16.90:1 contrast (WCAG AA passes).

Color values

HEX	#37100D
RGB	rgb(55, 16, 13)
HSL	hsl(4, 62%, 13%)
HSV	hsv(4, 76%, 22%)
CMYK	cmyk(0%, 70.9%, 76.4%, 78.4%)
CIE-LAB	lab(10.65, 19.25, 10.95)
CIE-LCH	lch(10.65, 22.14, 29.63°)
OKLab	oklab(23.71% 0.0562 0.029)
OKLCH	oklch(23.71% 0.063 27.3)
XYZ	xyz(1.8337, 1.2121, 0.5181)
Luminance	0.0121 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37100D #0D3437

analogous

#370D1F #37100D #37250D

triadic

#37100D #0D3710 #100D37

tetradic

#37100D #1F370D #0D3437 #250D37

square

#37100D #1F370D #0D3437 #250D37

split-complementary

#37100D #0D3725 #0D1F37

monochromatic

#190706 #190706 #37100D #681E19 #9A2D24

Accessibility & contrast

On white

16.90

#37100D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#37100D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37100D

16.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37100D	#FFFFFF	#000000	##FFFFFF
##37100D	1.00	16.90	1.24	16.90
#FFFFFF	16.90	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A170C

Deuteranopia (green-blind)

#24200C

Tritanopia (blue-blind)

#3D0810

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #37100d;
/* rgb */ color: rgb(55, 16, 13);
/* oklch */ color: oklch(23.7% 0.063 27.3);

Tailwind

colors: {
  custom: {
    50: '#71504c',
    500: '#37100d',
    950: '#000000',
  },
}

SCSS

$custom: #37100d;
$custom-light: #71504c;
$custom-dark: #000000;

JSON

{
  "hex": "#37100d",
  "rgb": {
    "r": 55,
    "g": 16,
    "b": 13
  },
  "hsl": {
    "h": 4.286,
    "s": 61.765,
    "l": 13.333
  },
  "oklch": {
    "l": 0.23707,
    "c": 0.06321,
    "h": 27.3
  },
  "luminance": 0.01212
}

Semantic roles & 50–950 ramp

primary

#37100D

secondary

#2D6E72

accent

#D9E543

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080201

muted

#7B7877

Preview Lab

Preview with #37100D

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

Preview Lab → · Contrast checker → · Palette generator →