#370A0A#370A0A

#370A0A is a very dark, moderate red. Relative luminance 0.011; OKLCH L 22.8% C 0.071 H 24.8°. Best body text is #FFFFFF at 17.35:1 contrast (WCAG AA passes).

Color values

HEX	#370A0A
RGB	rgb(55, 10, 10)
HSL	hsl(0, 69%, 13%)
HSV	hsv(0, 82%, 22%)
CMYK	cmyk(0%, 81.8%, 81.8%, 78.4%)
CIE-LAB	lab(9.41, 22.21, 10.53)
CIE-LCH	lch(9.41, 24.58, 25.36°)
OKLab	oklab(22.76% 0.0648 0.03)
OKLCH	oklch(22.76% 0.071 24.8)
XYZ	xyz(1.7391, 1.0515, 0.3985)
Luminance	0.0105 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370A0A #0A3737

analogous

#370A20 #370A0A #37200A

triadic

#370A0A #0A370A #0A0A37

tetradic

#370A0A #20370A #0A3737 #200A37

square

#370A0A #20370A #0A3737 #200A37

split-complementary

#370A0A #0A3720 #0A2037

monochromatic

#1A0505 #1A0505 #370A0A #6B1313 #9F1D1D

Accessibility & contrast

On white

17.35

#370A0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#370A0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370A0A

17.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370A0A	#FFFFFF	#000000	##FFFFFF
##370A0A	1.00	17.35	1.21	17.35
#FFFFFF	17.35	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17140A

Deuteranopia (green-blind)

#221E09

Tritanopia (blue-blind)

#3D010B

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #370a0a;
/* rgb */ color: rgb(55, 10, 10);
/* oklch */ color: oklch(22.8% 0.071 24.8);

Tailwind

colors: {
  custom: {
    50: '#724d4b',
    500: '#370a0a',
    950: '#000000',
  },
}

SCSS

$custom: #370a0a;
$custom-light: #724d4b;
$custom-dark: #000000;

JSON

{
  "hex": "#370a0a",
  "rgb": {
    "r": 55,
    "g": 10,
    "b": 10
  },
  "hsl": {
    "h": 0,
    "s": 69.231,
    "l": 12.745
  },
  "oklch": {
    "l": 0.22764,
    "c": 0.07138,
    "h": 24.8
  },
  "luminance": 0.01051
}

Semantic roles & 50–950 ramp

primary

#370A0A

secondary

#287474

accent

#ECEC3C

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080101

muted

#7B7777

Preview Lab

Preview with #370A0A

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

Preview Lab → · Contrast checker → · Palette generator →