#370A0D#370A0D

#370A0D is a very dark, moderate red. Relative luminance 0.011; OKLCH L 22.8% C 0.071 H 21.2°. Best body text is #FFFFFF at 17.33:1 contrast (WCAG AA passes).

Color values

HEX	#370A0D
RGB	rgb(55, 10, 13)
HSL	hsl(356, 69%, 13%)
HSV	hsv(356, 82%, 22%)
CMYK	cmyk(0%, 81.8%, 76.4%, 78.4%)
CIE-LAB	lab(9.47, 22.42, 9.28)
CIE-LCH	lch(9.47, 24.26, 22.50°)
OKLab	oklab(22.83% 0.0662 0.0257)
OKLCH	oklch(22.83% 0.071 21.2)
XYZ	xyz(1.7569, 1.0586, 0.4925)
Luminance	0.0106 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370A0D #0A3734

analogous

#370A23 #370A0D #371D0A

triadic

#370A0D #0D370A #0A0D37

tetradic

#370A0D #23370A #0A3734 #1D0A37

square

#370A0D #23370A #0A3734 #1D0A37

split-complementary

#370A0D #0A371D #0A2337

monochromatic

#1A0506 #1A0506 #370A0D #6B1319 #9F1D25

Accessibility & contrast

On white

17.33

#370A0D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#370A0D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370A0D

17.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370A0D	#FFFFFF	#000000	##FFFFFF
##370A0D	1.00	17.33	1.21	17.33
#FFFFFF	17.33	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16140D

Deuteranopia (green-blind)

#221E0C

Tritanopia (blue-blind)

#3D010B

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #370a0d;
/* rgb */ color: rgb(55, 10, 13);
/* oklch */ color: oklch(22.8% 0.071 21.2);

Tailwind

colors: {
  custom: {
    50: '#724d4c',
    500: '#370a0d',
    950: '#000000',
  },
}

SCSS

$custom: #370a0d;
$custom-light: #724d4c;
$custom-dark: #000000;

JSON

{
  "hex": "#370a0d",
  "rgb": {
    "r": 55,
    "g": 10,
    "b": 13
  },
  "hsl": {
    "h": 356,
    "s": 69.231,
    "l": 12.745
  },
  "oklch": {
    "l": 0.22826,
    "c": 0.071,
    "h": 21.2
  },
  "luminance": 0.01058
}

Semantic roles & 50–950 ramp

primary

#370A0D

secondary

#28746F

accent

#ECE03C

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080101

muted

#7B7777

Preview Lab

Preview with #370A0D

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

Preview Lab → · Contrast checker → · Palette generator →