#310B05#310B05

#310B05 is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.5% C 0.064 H 32.6°. Best body text is #FFFFFF at 17.79:1 contrast (WCAG AA passes).

Color values

HEX	#310B05
RGB	rgb(49, 11, 5)
HSL	hsl(8, 81%, 11%)
HSV	hsv(8, 90%, 19%)
CMYK	cmyk(0%, 77.6%, 89.8%, 80.8%)
CIE-LAB	lab(8.16, 18.83, 10.59)
CIE-LCH	lch(8.16, 21.60, 29.35°)
OKLab	oklab(21.55% 0.0535 0.0342)
OKLCH	oklch(21.55% 0.064 32.6)
XYZ	xyz(1.4138, 0.9035, 0.2435)
Luminance	0.0090 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310B05 #052B31

analogous

#310515 #310B05 #312105

triadic

#310B05 #05310B #0B0531

tetradic

#310B05 #153105 #052B31 #210531

square

#310B05 #153105 #052B31 #210531

split-complementary

#310B05 #053121 #051531

monochromatic

#1C0603 #1C0603 #310B05 #69170B #A02410

Accessibility & contrast

On white

17.79

#310B05 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#310B05 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310B05

17.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310B05	#FFFFFF	#000000	##FFFFFF
##310B05	1.00	17.79	1.18	17.79
#FFFFFF	17.79	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#161304

Deuteranopia (green-blind)

#1F1B04

Tritanopia (blue-blind)

#37030A

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310b05;
/* rgb */ color: rgb(49, 11, 5);
/* oklch */ color: oklch(21.5% 0.064 32.6);

Tailwind

colors: {
  custom: {
    50: '#6c4c49',
    500: '#310b05',
    950: '#000000',
  },
}

SCSS

$custom: #310b05;
$custom-light: #6c4c49;
$custom-dark: #000000;

JSON

{
  "hex": "#310b05",
  "rgb": {
    "r": 49,
    "g": 11,
    "b": 5
  },
  "hsl": {
    "h": 8.182,
    "s": 81.481,
    "l": 10.588
  },
  "oklch": {
    "l": 0.21545,
    "c": 0.06351,
    "h": 32.6
  },
  "luminance": 0.00903
}

Semantic roles & 50–950 ramp

primary

#310B05

secondary

#1F6772

accent

#DDF830

background

#F6F4F4

surface

#ECE7E6

border

#C7C3C2

text

#070100

muted

#7A7777

Preview Lab

Preview with #310B05

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

Preview Lab → · Contrast checker → · Palette generator →