#370F0B#370F0B

#370F0B is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.5% C 0.065 H 28.7°. Best body text is #FFFFFF at 17.00:1 contrast (WCAG AA passes).

Color values

HEX	#370F0B
RGB	rgb(55, 15, 11)
HSL	hsl(5, 67%, 13%)
HSV	hsv(5, 80%, 22%)
CMYK	cmyk(0%, 72.7%, 80%, 78.4%)
CIE-LAB	lab(10.40, 19.67, 11.51)
CIE-LCH	lch(10.40, 22.79, 30.32°)
OKLab	oklab(23.51% 0.057 0.0312)
OKLCH	oklch(23.51% 0.065 28.7)
XYZ	xyz(1.8070, 1.1783, 0.4488)
Luminance	0.0118 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#370F0B #0B3337

analogous

#370B1D #370F0B #37250B

triadic

#370F0B #0B370F #0F0B37

tetradic

#370F0B #1D370B #0B3337 #250B37

square

#370F0B #1D370B #0B3337 #250B37

split-complementary

#370F0B #0B3725 #0B1D37

monochromatic

#1A0705 #1A0705 #370F0B #6A1D15 #9D2B1F

Accessibility & contrast

On white

17.00

#370F0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#370F0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #370F0B

17.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##370F0B	#FFFFFF	#000000	##FFFFFF
##370F0B	1.00	17.00	1.24	17.00
#FFFFFF	17.00	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	17.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A170A

Deuteranopia (green-blind)

#24200A

Tritanopia (blue-blind)

#3D060E

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #370f0b;
/* rgb */ color: rgb(55, 15, 11);
/* oklch */ color: oklch(23.5% 0.065 28.7);

Tailwind

colors: {
  custom: {
    50: '#714f4b',
    500: '#370f0b',
    950: '#000000',
  },
}

SCSS

$custom: #370f0b;
$custom-light: #714f4b;
$custom-dark: #000000;

JSON

{
  "hex": "#370f0b",
  "rgb": {
    "r": 55,
    "g": 15,
    "b": 11
  },
  "hsl": {
    "h": 5.455,
    "s": 66.667,
    "l": 12.941
  },
  "oklch": {
    "l": 0.23507,
    "c": 0.06498,
    "h": 28.7
  },
  "luminance": 0.01178
}

Semantic roles & 50–950 ramp

primary

#370F0B

secondary

#2A6D74

accent

#DAEA3E

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080201

muted

#7B7877

Preview Lab

Preview with #370F0B

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

Preview Lab → · Contrast checker → · Palette generator →