#37100A#37100A

#37100A is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.7% C 0.064 H 31.1°. Best body text is #FFFFFF at 16.92:1 contrast (WCAG AA passes).

Color values

HEX	#37100A
RGB	rgb(55, 16, 10)
HSL	hsl(8, 69%, 13%)
HSV	hsv(8, 82%, 22%)
CMYK	cmyk(0%, 70.9%, 81.8%, 78.4%)
CIE-LAB	lab(10.59, 19.03, 12.20)
CIE-LCH	lch(10.59, 22.61, 32.66°)
OKLab	oklab(23.65% 0.0548 0.033)
OKLCH	oklch(23.65% 0.064 31.1)
XYZ	xyz(1.8158, 1.2050, 0.4241)
Luminance	0.0120 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37100A #0A3137

analogous

#370A1A #37100A #37260A

triadic

#37100A #0A3710 #100A37

tetradic

#37100A #1A370A #0A3137 #260A37

square

#37100A #1A370A #0A3137 #260A37

split-complementary

#37100A #0A3726 #0A1A37

monochromatic

#1A0805 #1A0805 #37100A #6B1F13 #9F2E1D

Accessibility & contrast

On white

16.92

#37100A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#37100A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37100A

16.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37100A	#FFFFFF	#000000	##FFFFFF
##37100A	1.00	16.92	1.24	16.92
#FFFFFF	16.92	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B1709

Deuteranopia (green-blind)

#242009

Tritanopia (blue-blind)

#3D070F

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #37100a;
/* rgb */ color: rgb(55, 16, 10);
/* oklch */ color: oklch(23.7% 0.064 31.1);

Tailwind

colors: {
  custom: {
    50: '#71504b',
    500: '#37100a',
    950: '#000000',
  },
}

SCSS

$custom: #37100a;
$custom-light: #71504b;
$custom-dark: #000000;

JSON

{
  "hex": "#37100a",
  "rgb": {
    "r": 55,
    "g": 16,
    "b": 10
  },
  "hsl": {
    "h": 8,
    "s": 69.231,
    "l": 12.745
  },
  "oklch": {
    "l": 0.23651,
    "c": 0.06398,
    "h": 31.1
  },
  "luminance": 0.01205
}

Semantic roles & 50–950 ramp

primary

#37100A

secondary

#286A74

accent

#D5EC3C

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080201

muted

#7B7877

Preview Lab

Preview with #37100A

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

Preview Lab → · Contrast checker → · Palette generator →