#310D0A#310D0A

#310D0A is a very dark, muted red. Relative luminance 0.010; OKLCH L 22.0% C 0.059 H 27.7°. Best body text is #FFFFFF at 17.61:1 contrast (WCAG AA passes).

Color values

HEX	#310D0A
RGB	rgb(49, 13, 10)
HSL	hsl(5, 66%, 12%)
HSV	hsv(5, 80%, 19%)
CMYK	cmyk(0%, 73.5%, 79.6%, 80.8%)
CIE-LAB	lab(8.68, 18.07, 9.30)
CIE-LCH	lch(8.68, 20.33, 27.23°)
OKLab	oklab(21.97% 0.0526 0.0277)
OKLCH	oklch(21.97% 0.059 27.7)
XYZ	xyz(1.4655, 0.9629, 0.3958)
Luminance	0.0096 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310D0A #0A2E31

analogous

#310A1B #310D0A #31210A

triadic

#310D0A #0A310D #0D0A31

tetradic

#310D0A #1B310A #0A2E31 #210A31

square

#310D0A #1B310A #0A2E31 #210A31

split-complementary

#310D0A #0A3121 #0A1B31

monochromatic

#190705 #190705 #310D0A #641A14 #97281F

Accessibility & contrast

On white

17.61

#310D0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#310D0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310D0A

17.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310D0A	#FFFFFF	#000000	##FFFFFF
##310D0A	1.00	17.61	1.19	17.61
#FFFFFF	17.61	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#161409

Deuteranopia (green-blind)

#1F1C09

Tritanopia (blue-blind)

#37060D

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #310d0a;
/* rgb */ color: rgb(49, 13, 10);
/* oklch */ color: oklch(22.0% 0.059 27.7);

Tailwind

colors: {
  custom: {
    50: '#6c4d4b',
    500: '#310d0a',
    950: '#000000',
  },
}

SCSS

$custom: #310d0a;
$custom-light: #6c4d4b;
$custom-dark: #000000;

JSON

{
  "hex": "#310d0a",
  "rgb": {
    "r": 49,
    "g": 13,
    "b": 10
  },
  "hsl": {
    "h": 4.615,
    "s": 66.102,
    "l": 11.569
  },
  "oklch": {
    "l": 0.21966,
    "c": 0.05945,
    "h": 27.7
  },
  "luminance": 0.00963
}

Semantic roles & 50–950 ramp

primary

#310D0A

secondary

#29696E

accent

#DCE93F

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #310D0A

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

Preview Lab → · Contrast checker → · Palette generator →