#310B0D#310B0D

#310B0D is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.7% C 0.062 H 20.9°. Best body text is #FFFFFF at 17.73:1 contrast (WCAG AA passes).

Color values

HEX	#310B0D
RGB	rgb(49, 11, 13)
HSL	hsl(357, 63%, 12%)
HSV	hsv(357, 78%, 19%)
CMYK	cmyk(0%, 77.6%, 73.5%, 80.8%)
CIE-LAB	lab(8.32, 19.44, 7.46)
CIE-LCH	lch(8.32, 20.82, 20.99°)
OKLab	oklab(21.72% 0.0576 0.022)
OKLCH	oklch(21.72% 0.062 20.9)
XYZ	xyz(1.4591, 0.9216, 0.4817)
Luminance	0.0092 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310B0D #0B312F

analogous

#310B20 #310B0D #311C0B

triadic

#310B0D #0D310B #0B0D31

tetradic

#310B0D #20310B #0B312F #1C0B31

square

#310B0D #20310B #0B312F #1C0B31

split-complementary

#310B0D #0B311C #0B2031

monochromatic

#190607 #190607 #310B0D #63161A #952128

Accessibility & contrast

On white

17.73

#310B0D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#310B0D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310B0D

17.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310B0D	#FFFFFF	#000000	##FFFFFF
##310B0D	1.00	17.73	1.18	17.73
#FFFFFF	17.73	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15130D

Deuteranopia (green-blind)

#1E1B0C

Tritanopia (blue-blind)

#37040C

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310b0d;
/* rgb */ color: rgb(49, 11, 13);
/* oklch */ color: oklch(21.7% 0.062 20.9);

Tailwind

colors: {
  custom: {
    50: '#6c4c4c',
    500: '#310b0d',
    950: '#000000',
  },
}

SCSS

$custom: #310b0d;
$custom-light: #6c4c4c;
$custom-dark: #000000;

JSON

{
  "hex": "#310b0d",
  "rgb": {
    "r": 49,
    "g": 11,
    "b": 13
  },
  "hsl": {
    "h": 356.842,
    "s": 63.333,
    "l": 11.765
  },
  "oklch": {
    "l": 0.21717,
    "c": 0.06169,
    "h": 20.9
  },
  "luminance": 0.00921
}

Semantic roles & 50–950 ramp

primary

#310B0D

secondary

#2A6E6A

accent

#E6DE41

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #310B0D

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

Preview Lab → · Contrast checker → · Palette generator →