#310B04#310B04

#310B04 is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.5% C 0.064 H 34.2°. Best body text is #FFFFFF at 17.79:1 contrast (WCAG AA passes).

Color values

HEX	#310B04
RGB	rgb(49, 11, 4)
HSL	hsl(9, 85%, 10%)
HSV	hsv(9, 92%, 19%)
CMYK	cmyk(0%, 77.6%, 91.8%, 80.8%)
CIE-LAB	lab(8.14, 18.76, 10.97)
CIE-LCH	lch(8.14, 21.73, 30.31°)
OKLab	oklab(21.52% 0.0529 0.0359)
OKLCH	oklch(21.52% 0.064 34.2)
XYZ	xyz(1.4084, 0.9013, 0.2146)
Luminance	0.0090 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310B04 #042A31

analogous

#310413 #310B04 #312104

triadic

#310B04 #04310B #0B0431

tetradic

#310B04 #133104 #042A31 #210431

square

#310B04 #133104 #042A31 #210431

split-complementary

#310B04 #043121 #041331

monochromatic

#1C0602 #1C0602 #310B04 #6A1809 #A2240D

Accessibility & contrast

On white

17.79

#310B04 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#310B04 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310B04

17.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310B04	#FFFFFF	#000000	##FFFFFF
##310B04	1.00	17.79	1.18	17.79
#FFFFFF	17.79	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#161203

Deuteranopia (green-blind)

#1F1B03

Tritanopia (blue-blind)

#370309

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310b04;
/* rgb */ color: rgb(49, 11, 4);
/* oklch */ color: oklch(21.5% 0.064 34.2);

Tailwind

colors: {
  custom: {
    50: '#6c4c48',
    500: '#310b04',
    950: '#000000',
  },
}

SCSS

$custom: #310b04;
$custom-light: #6c4c48;
$custom-dark: #000000;

JSON

{
  "hex": "#310b04",
  "rgb": {
    "r": 49,
    "g": 11,
    "b": 4
  },
  "hsl": {
    "h": 9.333,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.21524,
    "c": 0.06393,
    "h": 34.2
  },
  "luminance": 0.00901
}

Semantic roles & 50–950 ramp

primary

#310B04

secondary

#1D6673

accent

#DBFB2D

background

#F6F4F4

surface

#ECE7E6

border

#C7C3C2

text

#070100

muted

#7A7777

Preview Lab

Preview with #310B04

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

Preview Lab → · Contrast checker → · Palette generator →