#310B03#310B03

#310B03 is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.5% C 0.064 H 35.8°. Best body text is #FFFFFF at 17.80:1 contrast (WCAG AA passes).

Color values

HEX	#310B03
RGB	rgb(49, 11, 3)
HSL	hsl(10, 88%, 10%)
HSV	hsv(10, 94%, 19%)
CMYK	cmyk(0%, 77.6%, 93.9%, 80.8%)
CIE-LAB	lab(8.12, 18.68, 11.34)
CIE-LCH	lch(8.12, 21.85, 31.27°)
OKLab	oklab(21.5% 0.0522 0.0377)
OKLCH	oklch(21.5% 0.064 35.8)
XYZ	xyz(1.4029, 0.8991, 0.1858)
Luminance	0.0090 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310B03 #032931

analogous

#310312 #310B03 #312203

triadic

#310B03 #03310B #0B0331

tetradic

#310B03 #123103 #032931 #220331

square

#310B03 #123103 #032931 #220331

split-complementary

#310B03 #033122 #031231

monochromatic

#1D0602 #1D0602 #310B03 #6B1807 #A4250A

Accessibility & contrast

On white

17.80

#310B03 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#310B03 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310B03

17.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310B03	#FFFFFF	#000000	##FFFFFF
##310B03	1.00	17.80	1.18	17.80
#FFFFFF	17.80	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#161202

Deuteranopia (green-blind)

#1F1B02

Tritanopia (blue-blind)

#370309

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #310b03;
/* rgb */ color: rgb(49, 11, 3);
/* oklch */ color: oklch(21.5% 0.064 35.8);

Tailwind

colors: {
  custom: {
    50: '#6c4c48',
    500: '#310b03',
    950: '#000000',
  },
}

SCSS

$custom: #310b03;
$custom-light: #6c4c48;
$custom-dark: #000000;

JSON

{
  "hex": "#310b03",
  "rgb": {
    "r": 49,
    "g": 11,
    "b": 3
  },
  "hsl": {
    "h": 10.435,
    "s": 88.462,
    "l": 10.196
  },
  "oklch": {
    "l": 0.21503,
    "c": 0.06441,
    "h": 35.8
  },
  "luminance": 0.00899
}

Semantic roles & 50–950 ramp

primary

#310B03

secondary

#1B6574

accent

#D9FF29

background

#F6F4F4

surface

#ECE7E6

border

#C7C3C2

text

#070100

muted

#7A7777

Preview Lab

Preview with #310B03

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

Preview Lab → · Contrast checker → · Palette generator →