#310303#310303

#310303 is a very dark, moderate red. Relative luminance 0.007; OKLCH L 20.3% C 0.075 H 27.2°. Best body text is #FFFFFF at 18.34:1 contrast (WCAG AA passes).

Color values

HEX	#310303
RGB	rgb(49, 3, 3)
HSL	hsl(0, 88%, 10%)
HSV	hsv(0, 94%, 19%)
CMYK	cmyk(0%, 93.9%, 93.9%, 80.8%)
CIE-LAB	lab(6.55, 22.87, 9.05)
CIE-LCH	lch(6.55, 24.59, 21.58°)
OKLab	oklab(20.25% 0.0666 0.0342)
OKLCH	oklch(20.25% 0.075 27.2)
XYZ	xyz(1.3158, 0.7249, 0.1568)
Luminance	0.0073 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#310303 #033131

analogous

#31031A #310303 #311A03

triadic

#310303 #033103 #030331

tetradic

#310303 #1A3103 #033131 #1A0331

square

#310303 #1A3103 #033131 #1A0331

split-complementary

#310303 #03311A #031A31

monochromatic

#1D0202 #1D0202 #310303 #6B0707 #A40A0A

Accessibility & contrast

On white

18.34

#310303 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#310303 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #310303

18.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##310303	#FFFFFF	#000000	##FFFFFF
##310303	1.00	18.34	1.15	18.34
#FFFFFF	18.34	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#110E03

Deuteranopia (green-blind)

#1C1802

Tritanopia (blue-blind)

#370003

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #310303;
/* rgb */ color: rgb(49, 3, 3);
/* oklch */ color: oklch(20.3% 0.075 27.2);

Tailwind

colors: {
  custom: {
    50: '#6d4848',
    500: '#310303',
    950: '#000000',
  },
}

SCSS

$custom: #310303;
$custom-light: #6d4848;
$custom-dark: #000000;

JSON

{
  "hex": "#310303",
  "rgb": {
    "r": 49,
    "g": 3,
    "b": 3
  },
  "hsl": {
    "h": 0,
    "s": 88.462,
    "l": 10.196
  },
  "oklch": {
    "l": 0.20254,
    "c": 0.07485,
    "h": 27.2
  },
  "luminance": 0.00725
}

Semantic roles & 50–950 ramp

primary

#310303

secondary

#1B7474

accent

#FFFF29

background

#F6F4F4

surface

#ECE6E6

border

#C7C2C2

text

#080000

muted

#7A7777

Preview Lab

Preview with #310303

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

Preview Lab → · Contrast checker → · Palette generator →