#310B0A#310B0A

#310B0A is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.6% C 0.062 H 25.3°. Best body text is #FFFFFF at 17.75:1 contrast (WCAG AA passes).

Color values

HEX	#310B0A
RGB	rgb(49, 11, 10)
HSL	hsl(2, 66%, 12%)
HSV	hsv(2, 80%, 19%)
CMYK	cmyk(0%, 77.6%, 79.6%, 80.8%)
CIE-LAB	lab(8.26, 19.20, 8.69)
CIE-LCH	lch(8.26, 21.08, 24.35°)
OKLab	oklab(21.65% 0.0562 0.0265)
OKLCH	oklch(21.65% 0.062 25.3)
XYZ	xyz(1.4412, 0.9144, 0.3877)
Luminance	0.0091 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310B0A #0A3031

analogous

#310A1D #310B0A #311F0A

triadic

#310B0A #0A310B #0B0A31

tetradic

#310B0A #1D310A #0A3031 #1F0A31

square

#310B0A #1D310A #0A3031 #1F0A31

split-complementary

#310B0A #0A311F #0A1D31

monochromatic

#190605 #190605 #310B0A #641614 #97221F

Accessibility & contrast

On white

17.75

#310B0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#310B0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310B0A

17.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310B0A	#FFFFFF	#000000	##FFFFFF
##310B0A	1.00	17.75	1.18	17.75
#FFFFFF	17.75	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15130A

Deuteranopia (green-blind)

#1F1B09

Tritanopia (blue-blind)

#37040B

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310b0a;
/* rgb */ color: rgb(49, 11, 10);
/* oklch */ color: oklch(21.6% 0.062 25.3);

Tailwind

colors: {
  custom: {
    50: '#6c4c4b',
    500: '#310b0a',
    950: '#000000',
  },
}

SCSS

$custom: #310b0a;
$custom-light: #6c4c4b;
$custom-dark: #000000;

JSON

{
  "hex": "#310b0a",
  "rgb": {
    "r": 49,
    "g": 11,
    "b": 10
  },
  "hsl": {
    "h": 1.538,
    "s": 66.102,
    "l": 11.569
  },
  "oklch": {
    "l": 0.21649,
    "c": 0.06211,
    "h": 25.3
  },
  "luminance": 0.00914
}

Semantic roles & 50–950 ramp

primary

#310B0A

secondary

#296D6E

accent

#E5E93F

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #310B0A

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

Preview Lab → · Contrast checker → · Palette generator →