#31010B#31010B

#31010B is a very dark, moderate red. Relative luminance 0.007; OKLCH L 20.1% C 0.078 H 14.1°. Best body text is #FFFFFF at 18.42:1 contrast (WCAG AA passes).

Color values

HEX	#31010B
RGB	rgb(49, 1, 11)
HSL	hsl(348, 96%, 10%)
HSV	hsv(348, 98%, 19%)
CMYK	cmyk(0%, 98%, 77.6%, 80.8%)
CIE-LAB	lab(6.31, 24.54, 5.44)
CIE-LCH	lch(6.31, 25.14, 12.49°)
OKLab	oklab(20.11% 0.0754 0.019)
OKLCH	oklch(20.11% 0.078 14.1)
XYZ	xyz(1.3380, 0.6991, 0.3810)
Luminance	0.0070 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31010B #013127

analogous

#310123 #31010B #310F01

triadic

#31010B #0B3101 #010B31

tetradic

#31010B #233101 #013127 #0F0131

square

#31010B #233101 #013127 #0F0131

split-complementary

#31010B #01310F #012331

monochromatic

#1E0107 #1E0107 #31010B #6D0218 #A90326

Accessibility & contrast

On white

18.42

#31010B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.14

#31010B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31010B

18.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31010B	#FFFFFF	#000000	##FFFFFF
##31010B	1.00	18.42	1.14	18.42
#FFFFFF	18.42	1.00	21.00	1.00
#000000	1.14	21.00	1.00	21.00
##FFFFFF	18.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E0D0B

Deuteranopia (green-blind)

#1B180A

Tritanopia (blue-blind)

#370005

Achromatopsia (no color)

#141414

Design tokens & code

CSS

--color: #31010b;
/* rgb */ color: rgb(49, 1, 11);
/* oklch */ color: oklch(20.1% 0.078 14.1);

Tailwind

colors: {
  custom: {
    50: '#6d474c',
    500: '#31010b',
    950: '#000000',
  },
}

SCSS

$custom: #31010b;
$custom-light: #6d474c;
$custom-dark: #000000;

JSON

{
  "hex": "#31010b",
  "rgb": {
    "r": 49,
    "g": 1,
    "b": 11
  },
  "hsl": {
    "h": 347.5,
    "s": 96,
    "l": 9.804
  },
  "oklch": {
    "l": 0.20114,
    "c": 0.07774,
    "h": 14.1
  },
  "luminance": 0.00699
}

Semantic roles & 50–950 ramp

primary

#31010B

secondary

#177763

accent

#FFD229

background

#F6F4F4

surface

#ECE6E7

border

#C7C2C3

text

#070001

muted

#7A7777

Preview Lab

Preview with #31010B

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

Preview Lab → · Contrast checker → · Palette generator →