#310A0A#310A0A

#310A0A is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.5% C 0.063 H 24.2°. Best body text is #FFFFFF at 17.82:1 contrast (WCAG AA passes).

Color values

HEX	#310A0A
RGB	rgb(49, 10, 10)
HSL	hsl(0, 66%, 12%)
HSV	hsv(0, 80%, 19%)
CMYK	cmyk(0%, 79.6%, 79.6%, 80.8%)
CIE-LAB	lab(8.06, 19.73, 8.40)
CIE-LCH	lch(8.06, 21.45, 23.06°)
OKLab	oklab(21.5% 0.0579 0.026)
OKLCH	oklch(21.5% 0.063 24.2)
XYZ	xyz(1.4301, 0.8922, 0.3840)
Luminance	0.0089 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310A0A #0A3131

analogous

#310A1E #310A0A #311E0A

triadic

#310A0A #0A310A #0A0A31

tetradic

#310A0A #1E310A #0A3131 #1E0A31

square

#310A0A #1E310A #0A3131 #1E0A31

split-complementary

#310A0A #0A311E #0A1E31

monochromatic

#190505 #190505 #310A0A #641414 #971F1F

Accessibility & contrast

On white

17.82

#310A0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#310A0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310A0A

17.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310A0A	#FFFFFF	#000000	##FFFFFF
##310A0A	1.00	17.82	1.18	17.82
#FFFFFF	17.82	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15120A

Deuteranopia (green-blind)

#1E1B09

Tritanopia (blue-blind)

#37030A

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310a0a;
/* rgb */ color: rgb(49, 10, 10);
/* oklch */ color: oklch(21.5% 0.063 24.2);

Tailwind

colors: {
  custom: {
    50: '#6c4c4b',
    500: '#310a0a',
    950: '#000000',
  },
}

SCSS

$custom: #310a0a;
$custom-light: #6c4c4b;
$custom-dark: #000000;

JSON

{
  "hex": "#310a0a",
  "rgb": {
    "r": 49,
    "g": 10,
    "b": 10
  },
  "hsl": {
    "h": 0,
    "s": 66.102,
    "l": 11.569
  },
  "oklch": {
    "l": 0.215,
    "c": 0.06342,
    "h": 24.2
  },
  "luminance": 0.00892
}

Semantic roles & 50–950 ramp

primary

#310A0A

secondary

#296E6E

accent

#E9E93F

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #310A0A

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

Preview Lab → · Contrast checker → · Palette generator →