#370A0B#370A0B

#370A0B is a very dark, moderate red. Relative luminance 0.011; OKLCH L 22.8% C 0.071 H 23.7°. Best body text is #FFFFFF at 17.35:1 contrast (WCAG AA passes).

Color values

HEX	#370A0B
RGB	rgb(55, 10, 11)
HSL	hsl(359, 69%, 13%)
HSV	hsv(359, 82%, 22%)
CMYK	cmyk(0%, 81.8%, 80%, 78.4%)
CIE-LAB	lab(9.43, 22.28, 10.14)
CIE-LCH	lch(9.43, 24.48, 24.47°)
OKLab	oklab(22.78% 0.0652 0.0286)
OKLCH	oklch(22.78% 0.071 23.7)
XYZ	xyz(1.7447, 1.0537, 0.4281)
Luminance	0.0105 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370A0B #0A3736

analogous

#370A21 #370A0B #37200A

triadic

#370A0B #0B370A #0A0B37

tetradic

#370A0B #21370A #0A3736 #200A37

square

#370A0B #21370A #0A3736 #200A37

split-complementary

#370A0B #0A3720 #0A2137

monochromatic

#1A0505 #1A0505 #370A0B #6B1315 #9F1D20

Accessibility & contrast

On white

17.35

#370A0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#370A0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370A0B

17.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370A0B	#FFFFFF	#000000	##FFFFFF
##370A0B	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)

#17140B

Deuteranopia (green-blind)

#221E0A

Tritanopia (blue-blind)

#3D010B

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #370a0b;
/* rgb */ color: rgb(55, 10, 11);
/* oklch */ color: oklch(22.8% 0.071 23.7);

Tailwind

colors: {
  custom: {
    50: '#724d4b',
    500: '#370a0b',
    950: '#000000',
  },
}

SCSS

$custom: #370a0b;
$custom-light: #724d4b;
$custom-dark: #000000;

JSON

{
  "hex": "#370a0b",
  "rgb": {
    "r": 55,
    "g": 10,
    "b": 11
  },
  "hsl": {
    "h": 358.667,
    "s": 69.231,
    "l": 12.745
  },
  "oklch": {
    "l": 0.22784,
    "c": 0.07124,
    "h": 23.7
  },
  "luminance": 0.01053
}

Semantic roles & 50–950 ramp

primary

#370A0B

secondary

#287473

accent

#ECE83C

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080101

muted

#7B7777

Preview Lab

Preview with #370A0B

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

Preview Lab → · Contrast checker → · Palette generator →