#370F0F#370F0F

#370F0F is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.6% C 0.064 H 23.4°. Best body text is #FFFFFF at 16.97:1 contrast (WCAG AA passes).

Color values

HEX	#370F0F
RGB	rgb(55, 15, 15)
HSL	hsl(0, 57%, 14%)
HSV	hsv(0, 73%, 22%)
CMYK	cmyk(0%, 72.7%, 72.7%, 78.4%)
CIE-LAB	lab(10.47, 19.97, 9.69)
CIE-LCH	lch(10.47, 22.20, 25.89°)
OKLab	oklab(23.59% 0.0589 0.0255)
OKLCH	oklch(23.59% 0.064 23.4)
XYZ	xyz(1.8328, 1.1886, 0.5848)
Luminance	0.0119 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370F0F #0F3737

analogous

#370F23 #370F0F #37230F

triadic

#370F0F #0F370F #0F0F37

tetradic

#370F0F #23370F #0F3737 #230F37

square

#370F0F #23370F #0F3737 #230F37

split-complementary

#370F0F #0F3723 #0F2337

monochromatic

#180707 #180707 #370F0F #671C1C #972929

Accessibility & contrast

On white

16.97

#370F0F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#370F0F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370F0F

16.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370F0F	#FFFFFF	#000000	##FFFFFF
##370F0F	1.00	16.97	1.24	16.97
#FFFFFF	16.97	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19170F

Deuteranopia (green-blind)

#23200E

Tritanopia (blue-blind)

#3D070F

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #370f0f;
/* rgb */ color: rgb(55, 15, 15);
/* oklch */ color: oklch(23.6% 0.064 23.4);

Tailwind

colors: {
  custom: {
    50: '#714f4d',
    500: '#370f0f',
    950: '#000000',
  },
}

SCSS

$custom: #370f0f;
$custom-light: #714f4d;
$custom-dark: #000000;

JSON

{
  "hex": "#370f0f",
  "rgb": {
    "r": 55,
    "g": 15,
    "b": 15
  },
  "hsl": {
    "h": 0,
    "s": 57.143,
    "l": 13.725
  },
  "oklch": {
    "l": 0.2359,
    "c": 0.06418,
    "h": 23.4
  },
  "luminance": 0.01188
}

Semantic roles & 50–950 ramp

primary

#370F0F

secondary

#317171

accent

#E0E047

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080201

muted

#7B7877

Preview Lab

Preview with #370F0F

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

Preview Lab → · Contrast checker → · Palette generator →