#310404#310404

#310404 is a very dark, moderate red. Relative luminance 0.007; OKLCH L 20.4% C 0.073 H 26.6°. Best body text is #FFFFFF at 18.26:1 contrast (WCAG AA passes).

Color values

HEX	#310404
RGB	rgb(49, 4, 4)
HSL	hsl(0, 85%, 10%)
HSV	hsv(0, 92%, 19%)
CMYK	cmyk(0%, 91.8%, 91.8%, 80.8%)
CIE-LAB	lab(6.76, 22.43, 8.96)
CIE-LCH	lch(6.76, 24.15, 21.76°)
OKLab	oklab(20.44% 0.0653 0.0327)
OKLCH	oklch(20.44% 0.073 26.6)
XYZ	xyz(1.3321, 0.7488, 0.1892)
Luminance	0.0075 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310404 #043131

analogous

#31041A #310404 #311A04

triadic

#310404 #043104 #040431

tetradic

#310404 #1A3104 #043131 #1A0431

square

#310404 #1A3104 #043131 #1A0431

split-complementary

#310404 #04311A #041A31

monochromatic

#1C0202 #1C0202 #310404 #6A0909 #A20D0D

Accessibility & contrast

On white

18.26

#310404 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#310404 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310404

18.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310404	#FFFFFF	#000000	##FFFFFF
##310404	1.00	18.26	1.15	18.26
#FFFFFF	18.26	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#110F04

Deuteranopia (green-blind)

#1D1903

Tritanopia (blue-blind)

#370004

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #310404;
/* rgb */ color: rgb(49, 4, 4);
/* oklch */ color: oklch(20.4% 0.073 26.6);

Tailwind

colors: {
  custom: {
    50: '#6d4848',
    500: '#310404',
    950: '#000000',
  },
}

SCSS

$custom: #310404;
$custom-light: #6d4848;
$custom-dark: #000000;

JSON

{
  "hex": "#310404",
  "rgb": {
    "r": 49,
    "g": 4,
    "b": 4
  },
  "hsl": {
    "h": 0,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.20442,
    "c": 0.07304,
    "h": 26.6
  },
  "luminance": 0.00749
}

Semantic roles & 50–950 ramp

primary

#310404

secondary

#1D7373

accent

#FBFB2D

background

#F6F4F4

surface

#ECE6E6

border

#C7C2C2

text

#070100

muted

#7A7777

Preview Lab

Preview with #310404

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

Preview Lab → · Contrast checker → · Palette generator →