#310904#310904

#310904 is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.2% C 0.066 H 31.9°. Best body text is #FFFFFF at 17.93:1 contrast (WCAG AA passes).

Color values

HEX	#310904
RGB	rgb(49, 9, 4)
HSL	hsl(7, 85%, 10%)
HSV	hsv(7, 92%, 19%)
CMYK	cmyk(0%, 81.6%, 91.8%, 80.8%)
CIE-LAB	lab(7.74, 19.82, 10.39)
CIE-LCH	lch(7.74, 22.38, 27.65°)
OKLab	oklab(21.22% 0.0562 0.0351)
OKLCH	oklch(21.22% 0.066 31.9)
XYZ	xyz(1.3864, 0.8573, 0.2073)
Luminance	0.0086 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310904 #042C31

analogous

#310415 #310904 #311F04

triadic

#310904 #043109 #090431

tetradic

#310904 #153104 #042C31 #1F0431

square

#310904 #153104 #042C31 #1F0431

split-complementary

#310904 #04311F #041531

monochromatic

#1C0502 #1C0502 #310904 #6A1309 #A21E0D

Accessibility & contrast

On white

17.93

#310904 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#310904 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310904

17.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310904	#FFFFFF	#000000	##FFFFFF
##310904	1.00	17.93	1.17	17.93
#FFFFFF	17.93	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#151103

Deuteranopia (green-blind)

#1F1A03

Tritanopia (blue-blind)

#370108

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #310904;
/* rgb */ color: rgb(49, 9, 4);
/* oklch */ color: oklch(21.2% 0.066 31.9);

Tailwind

colors: {
  custom: {
    50: '#6c4b48',
    500: '#310904',
    950: '#000000',
  },
}

SCSS

$custom: #310904;
$custom-light: #6c4b48;
$custom-dark: #000000;

JSON

{
  "hex": "#310904",
  "rgb": {
    "r": 49,
    "g": 9,
    "b": 4
  },
  "hsl": {
    "h": 6.667,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.21224,
    "c": 0.06626,
    "h": 31.9
  },
  "luminance": 0.00857
}

Semantic roles & 50–950 ramp

primary

#310904

secondary

#1D6A73

accent

#E4FB2D

background

#F6F4F4

surface

#ECE7E6

border

#C7C3C2

text

#070100

muted

#7A7777

Preview Lab

Preview with #310904

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

Preview Lab → · Contrast checker → · Palette generator →