#310B11#310B11

#310B11 is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.8% C 0.062 H 14.5°. Best body text is #FFFFFF at 17.70:1 contrast (WCAG AA passes).

Color values

HEX	#310B11
RGB	rgb(49, 11, 17)
HSL	hsl(351, 63%, 12%)
HSV	hsv(351, 78%, 19%)
CMYK	cmyk(0%, 77.6%, 65.3%, 80.8%)
CIE-LAB	lab(8.42, 19.81, 5.48)
CIE-LCH	lch(8.42, 20.55, 15.46°)
OKLab	oklab(21.82% 0.0597 0.0154)
OKLCH	oklch(21.82% 0.062 14.5)
XYZ	xyz(1.4876, 0.9330, 0.6320)
Luminance	0.0093 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310B11 #0B312B

analogous

#310B24 #310B11 #31180B

triadic

#310B11 #11310B #0B1131

tetradic

#310B11 #24310B #0B312B #180B31

square

#310B11 #24310B #0B312B #180B31

split-complementary

#310B11 #0B3118 #0B2431

monochromatic

#190609 #190609 #310B11 #631622 #952134

Accessibility & contrast

On white

17.70

#310B11 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#310B11 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310B11

17.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310B11	#FFFFFF	#000000	##FFFFFF
##310B11	1.00	17.70	1.19	17.70
#FFFFFF	17.70	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#141311

Deuteranopia (green-blind)

#1E1B10

Tritanopia (blue-blind)

#36050D

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310b11;
/* rgb */ color: rgb(49, 11, 17);
/* oklch */ color: oklch(21.8% 0.062 14.5);

Tailwind

colors: {
  custom: {
    50: '#6c4c4f',
    500: '#310b11',
    950: '#000000',
  },
}

SCSS

$custom: #310b11;
$custom-light: #6c4c4f;
$custom-dark: #000000;

JSON

{
  "hex": "#310b11",
  "rgb": {
    "r": 49,
    "g": 11,
    "b": 17
  },
  "hsl": {
    "h": 350.526,
    "s": 63.333,
    "l": 11.765
  },
  "oklch": {
    "l": 0.21824,
    "c": 0.06161,
    "h": 14.5
  },
  "luminance": 0.00933
}

Semantic roles & 50–950 ramp

primary

#310B11

secondary

#2A6E63

accent

#E6CC41

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #310B11

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

Preview Lab → · Contrast checker → · Palette generator →