#37100B#37100B

#37100B is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.7% C 0.064 H 29.9°. Best body text is #FFFFFF at 16.92:1 contrast (WCAG AA passes).

Color values

HEX	#37100B
RGB	rgb(55, 16, 11)
HSL	hsl(7, 67%, 13%)
HSV	hsv(7, 80%, 22%)
CMYK	cmyk(0%, 70.9%, 80%, 78.4%)
CIE-LAB	lab(10.61, 19.10, 11.81)
CIE-LCH	lch(10.61, 22.45, 31.72°)
OKLab	oklab(23.67% 0.0552 0.0317)
OKLCH	oklch(23.67% 0.064 29.9)
XYZ	xyz(1.8214, 1.2072, 0.4536)
Luminance	0.0121 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37100B #0B3237

analogous

#370B1C #37100B #37260B

triadic

#37100B #0B3710 #100B37

tetradic

#37100B #1C370B #0B3237 #260B37

square

#37100B #1C370B #0B3237 #260B37

split-complementary

#37100B #0B3726 #0B1C37

monochromatic

#1A0705 #1A0705 #37100B #6A1F15 #9D2E1F

Accessibility & contrast

On white

16.92

#37100B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#37100B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37100B

16.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37100B	#FFFFFF	#000000	##FFFFFF
##37100B	1.00	16.92	1.24	16.92
#FFFFFF	16.92	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A170A

Deuteranopia (green-blind)

#24200A

Tritanopia (blue-blind)

#3D080F

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #37100b;
/* rgb */ color: rgb(55, 16, 11);
/* oklch */ color: oklch(23.7% 0.064 29.9);

Tailwind

colors: {
  custom: {
    50: '#71504b',
    500: '#37100b',
    950: '#000000',
  },
}

SCSS

$custom: #37100b;
$custom-light: #71504b;
$custom-dark: #000000;

JSON

{
  "hex": "#37100b",
  "rgb": {
    "r": 55,
    "g": 16,
    "b": 11
  },
  "hsl": {
    "h": 6.818,
    "s": 66.667,
    "l": 12.941
  },
  "oklch": {
    "l": 0.23669,
    "c": 0.0637,
    "h": 29.9
  },
  "luminance": 0.01207
}

Semantic roles & 50–950 ramp

primary

#37100B

secondary

#2A6B74

accent

#D6EA3E

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#080201

muted

#7B7877

Preview Lab

Preview with #37100B

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

Preview Lab → · Contrast checker → · Palette generator →