#31070B#31070B

#31070B is a very dark, moderate red. Relative luminance 0.008; OKLCH L 21.1% C 0.068 H 19.7°. Best body text is #FFFFFF at 18.01:1 contrast (WCAG AA passes).

Color values

HEX	#31070B
RGB	rgb(49, 7, 11)
HSL	hsl(354, 75%, 11%)
HSV	hsv(354, 86%, 19%)
CMYK	cmyk(0%, 85.7%, 77.6%, 80.8%)
CIE-LAB	lab(7.49, 21.40, 7.16)
CIE-LCH	lch(7.49, 22.57, 18.49°)
OKLab	oklab(21.08% 0.0636 0.0228)
OKLCH	oklch(21.08% 0.068 19.7)
XYZ	xyz(1.4032, 0.8293, 0.4027)
Luminance	0.0083 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31070B #07312D

analogous

#310720 #31070B #311807

triadic

#31070B #0B3107 #070B31

tetradic

#31070B #203107 #07312D #180731

square

#31070B #203107 #07312D #180731

split-complementary

#31070B #073118 #072031

monochromatic

#1B0406 #1B0406 #31070B #670F17 #9C1623

Accessibility & contrast

On white

18.01

#31070B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#31070B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31070B

18.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31070B	#FFFFFF	#000000	##FFFFFF
##31070B	1.00	18.01	1.17	18.01
#FFFFFF	18.01	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	18.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12110B

Deuteranopia (green-blind)

#1D1A0A

Tritanopia (blue-blind)

#370009

Achromatopsia (no color)

#161616

Design tokens & code

CSS

--color: #31070b;
/* rgb */ color: rgb(49, 7, 11);
/* oklch */ color: oklch(21.1% 0.068 19.7);

Tailwind

colors: {
  custom: {
    50: '#6d4a4b',
    500: '#31070b',
    950: '#000000',
  },
}

SCSS

$custom: #31070b;
$custom-light: #6d4a4b;
$custom-dark: #000000;

JSON

{
  "hex": "#31070b",
  "rgb": {
    "r": 49,
    "g": 7,
    "b": 11
  },
  "hsl": {
    "h": 354.286,
    "s": 75,
    "l": 10.98
  },
  "oklch": {
    "l": 0.21075,
    "c": 0.06753,
    "h": 19.7
  },
  "luminance": 0.00829
}

Semantic roles & 50–950 ramp

primary

#31070B

secondary

#237169

accent

#F2E036

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #31070B

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

Preview Lab → · Contrast checker → · Palette generator →