#310A0B#310A0B

#310A0B is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.5% C 0.063 H 22.8°. Best body text is #FFFFFF at 17.81:1 contrast (WCAG AA passes).

Color values

HEX	#310A0B
RGB	rgb(49, 10, 11)
HSL	hsl(358, 66%, 12%)
HSV	hsv(358, 80%, 19%)
CMYK	cmyk(0%, 79.6%, 77.6%, 80.8%)
CIE-LAB	lab(8.08, 19.81, 8.01)
CIE-LCH	lch(8.08, 21.37, 22.02°)
OKLab	oklab(21.52% 0.0584 0.0245)
OKLCH	oklch(21.52% 0.063 22.8)
XYZ	xyz(1.4357, 0.8944, 0.4136)
Luminance	0.0089 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310A0B #0A3130

analogous

#310A1F #310A0B #311D0A

triadic

#310A0B #0B310A #0A0B31

tetradic

#310A0B #1F310A #0A3130 #1D0A31

square

#310A0B #1F310A #0A3130 #1D0A31

split-complementary

#310A0B #0A311D #0A1F31

monochromatic

#190506 #190506 #310A0B #641416 #971F22

Accessibility & contrast

On white

17.81

#310A0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#310A0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310A0B

17.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310A0B	#FFFFFF	#000000	##FFFFFF
##310A0B	1.00	17.81	1.18	17.81
#FFFFFF	17.81	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#14120B

Deuteranopia (green-blind)

#1E1B0A

Tritanopia (blue-blind)

#37030B

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310a0b;
/* rgb */ color: rgb(49, 10, 11);
/* oklch */ color: oklch(21.5% 0.063 22.8);

Tailwind

colors: {
  custom: {
    50: '#6c4c4b',
    500: '#310a0b',
    950: '#000000',
  },
}

SCSS

$custom: #310a0b;
$custom-light: #6c4c4b;
$custom-dark: #000000;

JSON

{
  "hex": "#310a0b",
  "rgb": {
    "r": 49,
    "g": 10,
    "b": 11
  },
  "hsl": {
    "h": 358.462,
    "s": 66.102,
    "l": 11.569
  },
  "oklch": {
    "l": 0.21522,
    "c": 0.06328,
    "h": 22.8
  },
  "luminance": 0.00894
}

Semantic roles & 50–950 ramp

primary

#310A0B

secondary

#296E6D

accent

#E9E53F

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #310A0B

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

Preview Lab → · Contrast checker → · Palette generator →