#180401#180401

#180401 is a very dark, muted red. Relative luminance 0.003; OKLCH L 14.6% C 0.041 H 38.0°. Best body text is #FFFFFF at 19.88:1 contrast (WCAG AA passes).

Color values

HEX	#180401
RGB	rgb(24, 4, 1)
HSL	hsl(8, 92%, 5%)
HSV	hsv(8, 96%, 9%)
CMYK	cmyk(0%, 83.3%, 95.8%, 90.6%)
CIE-LAB	lab(2.56, 6.40, 3.54)
CIE-LCH	lch(2.56, 7.32, 28.93°)
OKLab	oklab(14.59% 0.0325 0.0254)
OKLCH	oklch(14.59% 0.041 38)
XYZ	xyz(0.4256, 0.2833, 0.0610)
Luminance	0.0028 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180401 #011518

analogous

#18010A #180401 #181001

triadic

#180401 #011804 #040118

tetradic

#180401 #0A1801 #011518 #100118

square

#180401 #0A1801 #011518 #100118

split-complementary

#180401 #011810 #010A18

monochromatic

#1D0501 #1D0501 #1D0501 #530E03 #8E1806

Accessibility & contrast

On white

19.88

#180401 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#180401 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180401

19.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180401	#FFFFFF	#000000	##FFFFFF
##180401	1.00	19.88	1.06	19.88
#FFFFFF	19.88	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#090701

Deuteranopia (green-blind)

#0E0B01

Tritanopia (blue-blind)

#1C0203

Achromatopsia (no color)

#090909

Design tokens & code

CSS

--color: #180401;
/* rgb */ color: rgb(24, 4, 1);
/* oklch */ color: oklch(14.6% 0.041 38.0);

Tailwind

colors: {
  custom: {
    50: '#544847',
    500: '#180401',
    950: '#000000',
  },
}

SCSS

$custom: #180401;
$custom-light: #544847;
$custom-dark: #000000;

JSON

{
  "hex": "#180401",
  "rgb": {
    "r": 24,
    "g": 4,
    "b": 1
  },
  "hsl": {
    "h": 7.826,
    "s": 92,
    "l": 4.902
  },
  "oklch": {
    "l": 0.14591,
    "c": 0.04122,
    "h": 38
  },
  "luminance": 0.00283
}

Semantic roles & 50–950 ramp

primary

#180401

secondary

#155660

accent

#E3FF29

background

#F4F4F3

surface

#E7E6E5

border

#C3C2C1

text

#020000

muted

#787777

Preview Lab

Preview with #180401

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

Preview Lab → · Contrast checker → · Palette generator →