#310B09#310B09

#310B09 is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.6% C 0.062 H 26.7°. Best body text is #FFFFFF at 17.76:1 contrast (WCAG AA passes).

Color values

HEX	#310B09
RGB	rgb(49, 11, 9)
HSL	hsl(3, 69%, 11%)
HSV	hsv(3, 82%, 19%)
CMYK	cmyk(0%, 77.6%, 81.6%, 80.8%)
CIE-LAB	lab(8.24, 19.13, 9.07)
CIE-LCH	lch(8.24, 21.17, 25.37°)
OKLab	oklab(21.63% 0.0557 0.028)
OKLCH	oklch(21.63% 0.062 26.7)
XYZ	xyz(1.4358, 0.9122, 0.3589)
Luminance	0.0091 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310B09 #092F31

analogous

#31091B #310B09 #311F09

triadic

#310B09 #09310B #0B0931

tetradic

#310B09 #1B3109 #092F31 #1F0931

square

#310B09 #1B3109 #092F31 #1F0931

split-complementary

#310B09 #09311F #091B31

monochromatic

#1A0605 #1A0605 #310B09 #651712 #98221C

Accessibility & contrast

On white

17.76

#310B09 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#310B09 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310B09

17.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310B09	#FFFFFF	#000000	##FFFFFF
##310B09	1.00	17.76	1.18	17.76
#FFFFFF	17.76	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#151309

Deuteranopia (green-blind)

#1F1B08

Tritanopia (blue-blind)

#37040B

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310b09;
/* rgb */ color: rgb(49, 11, 9);
/* oklch */ color: oklch(21.6% 0.062 26.7);

Tailwind

colors: {
  custom: {
    50: '#6c4c4b',
    500: '#310b09',
    950: '#000000',
  },
}

SCSS

$custom: #310b09;
$custom-light: #6c4c4b;
$custom-dark: #000000;

JSON

{
  "hex": "#310b09",
  "rgb": {
    "r": 49,
    "g": 11,
    "b": 9
  },
  "hsl": {
    "h": 3,
    "s": 68.966,
    "l": 11.373
  },
  "oklch": {
    "l": 0.21628,
    "c": 0.06231,
    "h": 26.7
  },
  "luminance": 0.00912
}

Semantic roles & 50–950 ramp

primary

#310B09

secondary

#276B6F

accent

#E3EC3C

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #310B09

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

Preview Lab → · Contrast checker → · Palette generator →