#31040C#31040C

#31040C is a very dark, moderate red. Relative luminance 0.008; OKLCH L 20.6% C 0.072 H 15.5°. Best body text is #FFFFFF at 18.21:1 contrast (WCAG AA passes).

Color values

HEX	#31040C
RGB	rgb(49, 4, 12)
HSL	hsl(349, 85%, 10%)
HSV	hsv(349, 92%, 19%)
CMYK	cmyk(0%, 91.8%, 75.5%, 80.8%)
CIE-LAB	lab(6.92, 23.06, 5.89)
CIE-LCH	lch(6.92, 23.80, 14.32°)
OKLab	oklab(20.63% 0.0697 0.0193)
OKLCH	oklch(20.63% 0.072 15.5)
XYZ	xyz(1.3765, 0.7666, 0.4232)
Luminance	0.0077 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31040C #043129

analogous

#310422 #31040C #311204

triadic

#31040C #0C3104 #040C31

tetradic

#31040C #223104 #043129 #120431

square

#31040C #223104 #043129 #120431

split-complementary

#31040C #043112 #042231

monochromatic

#1C0207 #1C0207 #31040C #6A091A #A20D28

Accessibility & contrast

On white

18.21

#31040C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#31040C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31040C

18.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31040C	#FFFFFF	#000000	##FFFFFF
##31040C	1.00	18.21	1.15	18.21
#FFFFFF	18.21	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#100F0C

Deuteranopia (green-blind)

#1C190B

Tritanopia (blue-blind)

#370007

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #31040c;
/* rgb */ color: rgb(49, 4, 12);
/* oklch */ color: oklch(20.6% 0.072 15.5);

Tailwind

colors: {
  custom: {
    50: '#6d484c',
    500: '#31040c',
    950: '#000000',
  },
}

SCSS

$custom: #31040c;
$custom-light: #6d484c;
$custom-dark: #000000;

JSON

{
  "hex": "#31040c",
  "rgb": {
    "r": 49,
    "g": 4,
    "b": 12
  },
  "hsl": {
    "h": 349.333,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.20631,
    "c": 0.07235,
    "h": 15.5
  },
  "luminance": 0.00766
}

Semantic roles & 50–950 ramp

primary

#31040C

secondary

#1D7364

accent

#FBD62D

background

#F6F4F4

surface

#ECE7E7

border

#C7C3C3

text

#070101

muted

#7A7777

Preview Lab

Preview with #31040C

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

Preview Lab → · Contrast checker → · Palette generator →