#310403#310403

#310403 is a very dark, moderate red. Relative luminance 0.007; OKLCH L 20.4% C 0.073 H 28.2°. Best body text is #FFFFFF at 18.27:1 contrast (WCAG AA passes).

Color values

HEX	#310403
RGB	rgb(49, 4, 3)
HSL	hsl(1, 88%, 10%)
HSV	hsv(1, 94%, 19%)
CMYK	cmyk(0%, 91.8%, 93.9%, 80.8%)
CIE-LAB	lab(6.74, 22.35, 9.33)
CIE-LCH	lch(6.74, 24.22, 22.67°)
OKLab	oklab(20.42% 0.0646 0.0347)
OKLCH	oklch(20.42% 0.073 28.2)
XYZ	xyz(1.3266, 0.7466, 0.1604)
Luminance	0.0075 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310403 #033031

analogous

#310319 #310403 #311B03

triadic

#310403 #033104 #040331

tetradic

#310403 #193103 #033031 #1B0331

square

#310403 #193103 #033031 #1B0331

split-complementary

#310403 #03311B #031931

monochromatic

#1D0202 #1D0202 #310403 #6B0907 #A40D0A

Accessibility & contrast

On white

18.27

#310403 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#310403 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310403

18.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310403	#FFFFFF	#000000	##FFFFFF
##310403	1.00	18.27	1.15	18.27
#FFFFFF	18.27	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#110E03

Deuteranopia (green-blind)

#1D1902

Tritanopia (blue-blind)

#370004

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #310403;
/* rgb */ color: rgb(49, 4, 3);
/* oklch */ color: oklch(20.4% 0.073 28.2);

Tailwind

colors: {
  custom: {
    50: '#6d4848',
    500: '#310403',
    950: '#000000',
  },
}

SCSS

$custom: #310403;
$custom-light: #6d4848;
$custom-dark: #000000;

JSON

{
  "hex": "#310403",
  "rgb": {
    "r": 49,
    "g": 4,
    "b": 3
  },
  "hsl": {
    "h": 1.304,
    "s": 88.462,
    "l": 10.196
  },
  "oklch": {
    "l": 0.20419,
    "c": 0.07332,
    "h": 28.2
  },
  "luminance": 0.00746
}

Semantic roles & 50–950 ramp

primary

#310403

secondary

#1B7274

accent

#FAFF29

background

#F6F4F4

surface

#ECE6E6

border

#C7C2C2

text

#070100

muted

#7A7777

Preview Lab

Preview with #310403

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

Preview Lab → · Contrast checker → · Palette generator →