#310D0B#310D0B

#310D0B is a very dark, muted red. Relative luminance 0.010; OKLCH L 22.0% C 0.059 H 26.3°. Best body text is #FFFFFF at 17.60:1 contrast (WCAG AA passes).

Color values

HEX	#310D0B
RGB	rgb(49, 13, 11)
HSL	hsl(3, 63%, 12%)
HSV	hsv(3, 78%, 19%)
CMYK	cmyk(0%, 73.5%, 77.6%, 80.8%)
CIE-LAB	lab(8.70, 18.15, 8.91)
CIE-LCH	lch(8.70, 20.22, 26.15°)
OKLab	oklab(21.99% 0.0531 0.0262)
OKLCH	oklch(21.99% 0.059 26.3)
XYZ	xyz(1.4711, 0.9652, 0.4254)
Luminance	0.0097 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310D0B #0B2F31

analogous

#310B1C #310D0B #31200B

triadic

#310D0B #0B310D #0D0B31

tetradic

#310D0B #1C310B #0B2F31 #200B31

square

#310D0B #1C310B #0B2F31 #200B31

split-complementary

#310D0B #0B3120 #0B1C31

monochromatic

#190706 #190706 #310D0B #631A16 #952821

Accessibility & contrast

On white

17.60

#310D0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#310D0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310D0B

17.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310D0B	#FFFFFF	#000000	##FFFFFF
##310D0B	1.00	17.60	1.19	17.60
#FFFFFF	17.60	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16140B

Deuteranopia (green-blind)

#1F1C0A

Tritanopia (blue-blind)

#37060D

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #310d0b;
/* rgb */ color: rgb(49, 13, 11);
/* oklch */ color: oklch(22.0% 0.059 26.3);

Tailwind

colors: {
  custom: {
    50: '#6c4d4b',
    500: '#310d0b',
    950: '#000000',
  },
}

SCSS

$custom: #310d0b;
$custom-light: #6c4d4b;
$custom-dark: #000000;

JSON

{
  "hex": "#310d0b",
  "rgb": {
    "r": 49,
    "g": 13,
    "b": 11
  },
  "hsl": {
    "h": 3.158,
    "s": 63.333,
    "l": 11.765
  },
  "oklch": {
    "l": 0.21987,
    "c": 0.05923,
    "h": 26.3
  },
  "luminance": 0.00965
}

Semantic roles & 50–950 ramp

primary

#310D0B

secondary

#2A6A6E

accent

#DEE641

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #310D0B

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

Preview Lab → · Contrast checker → · Palette generator →