#31030B#31030B

#31030B is a very dark, moderate red. Relative luminance 0.007; OKLCH L 20.4% C 0.074 H 15.9°. Best body text is #FFFFFF at 18.29:1 contrast (WCAG AA passes).

Color values

HEX	#31030B
RGB	rgb(49, 3, 11)
HSL	hsl(350, 88%, 10%)
HSV	hsv(350, 94%, 19%)
CMYK	cmyk(0%, 93.9%, 77.6%, 80.8%)
CIE-LAB	lab(6.71, 23.50, 6.01)
CIE-LCH	lch(6.71, 24.26, 14.34°)
OKLab	oklab(20.45% 0.0712 0.0203)
OKLCH	oklch(20.45% 0.074 15.9)
XYZ	xyz(1.3597, 0.7425, 0.3883)
Luminance	0.0074 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31030B #033129

analogous

#310322 #31030B #311203

triadic

#31030B #0B3103 #030B31

tetradic

#31030B #223103 #033129 #120331

square

#31030B #223103 #033129 #120331

split-complementary

#31030B #033112 #032231

monochromatic

#1D0206 #1D0206 #31030B #6B0718 #A40A25

Accessibility & contrast

On white

18.29

#31030B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#31030B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31030B

18.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31030B	#FFFFFF	#000000	##FFFFFF
##31030B	1.00	18.29	1.15	18.29
#FFFFFF	18.29	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F0E0B

Deuteranopia (green-blind)

#1C180A

Tritanopia (blue-blind)

#370006

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #31030b;
/* rgb */ color: rgb(49, 3, 11);
/* oklch */ color: oklch(20.4% 0.074 15.9);

Tailwind

colors: {
  custom: {
    50: '#6d484c',
    500: '#31030b',
    950: '#000000',
  },
}

SCSS

$custom: #31030b;
$custom-light: #6d484c;
$custom-dark: #000000;

JSON

{
  "hex": "#31030b",
  "rgb": {
    "r": 49,
    "g": 3,
    "b": 11
  },
  "hsl": {
    "h": 349.565,
    "s": 88.462,
    "l": 10.196
  },
  "oklch": {
    "l": 0.20445,
    "c": 0.07405,
    "h": 15.9
  },
  "luminance": 0.00742
}

Semantic roles & 50–950 ramp

primary

#31030B

secondary

#1B7465

accent

#FFD929

background

#F6F4F4

surface

#ECE6E7

border

#C7C2C3

text

#070001

muted

#7A7777

Preview Lab

Preview with #31030B

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

Preview Lab → · Contrast checker → · Palette generator →