#31040A#31040A

#31040A is a very dark, moderate red. Relative luminance 0.008; OKLCH L 20.6% C 0.072 H 18.1°. Best body text is #FFFFFF at 18.22:1 contrast (WCAG AA passes).

Color values

HEX	#31040A
RGB	rgb(49, 4, 10)
HSL	hsl(352, 85%, 10%)
HSV	hsv(352, 92%, 19%)
CMYK	cmyk(0%, 91.8%, 79.6%, 80.8%)
CIE-LAB	lab(6.88, 22.90, 6.68)
CIE-LCH	lch(6.88, 23.86, 16.27°)
OKLab	oklab(20.58% 0.0687 0.0225)
OKLCH	oklch(20.58% 0.072 18.1)
XYZ	xyz(1.3650, 0.7619, 0.3623)
Luminance	0.0076 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31040A #04312B

analogous

#310420 #31040A #311404

triadic

#31040A #0A3104 #040A31

tetradic

#31040A #203104 #04312B #140431

square

#31040A #203104 #04312B #140431

split-complementary

#31040A #043114 #042031

monochromatic

#1C0206 #1C0206 #31040A #6A0916 #A20D21

Accessibility & contrast

On white

18.22

#31040A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#31040A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31040A

18.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31040A	#FFFFFF	#000000	##FFFFFF
##31040A	1.00	18.22	1.15	18.22
#FFFFFF	18.22	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#100F0A

Deuteranopia (green-blind)

#1C1909

Tritanopia (blue-blind)

#370006

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #31040a;
/* rgb */ color: rgb(49, 4, 10);
/* oklch */ color: oklch(20.6% 0.072 18.1);

Tailwind

colors: {
  custom: {
    50: '#6d484b',
    500: '#31040a',
    950: '#000000',
  },
}

SCSS

$custom: #31040a;
$custom-light: #6d484b;
$custom-dark: #000000;

JSON

{
  "hex": "#31040a",
  "rgb": {
    "r": 49,
    "g": 4,
    "b": 10
  },
  "hsl": {
    "h": 352,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.20582,
    "c": 0.07232,
    "h": 18.1
  },
  "luminance": 0.00762
}

Semantic roles & 50–950 ramp

primary

#31040A

secondary

#1D7368

accent

#FBE02D

background

#F6F4F4

surface

#ECE6E7

border

#C7C2C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #31040A

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

Preview Lab → · Contrast checker → · Palette generator →