#310903#310903

#310903 is a very dark, moderate red. Relative luminance 0.009; OKLCH L 21.2% C 0.067 H 33.5°. Best body text is #FFFFFF at 17.93:1 contrast (WCAG AA passes).

Color values

HEX	#310903
RGB	rgb(49, 9, 3)
HSL	hsl(8, 88%, 10%)
HSV	hsv(8, 94%, 19%)
CMYK	cmyk(0%, 81.6%, 93.9%, 80.8%)
CIE-LAB	lab(7.72, 19.75, 10.76)
CIE-LCH	lch(7.72, 22.49, 28.60°)
OKLab	oklab(21.2% 0.0556 0.0368)
OKLCH	oklch(21.2% 0.067 33.5)
XYZ	xyz(1.3809, 0.8551, 0.1785)
Luminance	0.0086 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310903 #032B31

analogous

#310314 #310903 #312003

triadic

#310903 #033109 #090331

tetradic

#310903 #143103 #032B31 #200331

square

#310903 #143103 #032B31 #200331

split-complementary

#310903 #033120 #031431

monochromatic

#1D0502 #1D0502 #310903 #6B1407 #A41E0A

Accessibility & contrast

On white

17.93

#310903 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#310903 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310903

17.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310903	#FFFFFF	#000000	##FFFFFF
##310903	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)

#151102

Deuteranopia (green-blind)

#1F1A02

Tritanopia (blue-blind)

#370108

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #310903;
/* rgb */ color: rgb(49, 9, 3);
/* oklch */ color: oklch(21.2% 0.067 33.5);

Tailwind

colors: {
  custom: {
    50: '#6d4b48',
    500: '#310903',
    950: '#000000',
  },
}

SCSS

$custom: #310903;
$custom-light: #6d4b48;
$custom-dark: #000000;

JSON

{
  "hex": "#310903",
  "rgb": {
    "r": 49,
    "g": 9,
    "b": 3
  },
  "hsl": {
    "h": 7.826,
    "s": 88.462,
    "l": 10.196
  },
  "oklch": {
    "l": 0.21203,
    "c": 0.06667,
    "h": 33.5
  },
  "luminance": 0.00855
}

Semantic roles & 50–950 ramp

primary

#310903

secondary

#1B6974

accent

#E3FF29

background

#F6F4F4

surface

#ECE7E6

border

#C7C3C2

text

#070100

muted

#7A7777

Preview Lab

Preview with #310903

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

Preview Lab → · Contrast checker → · Palette generator →