#180403#180403

#180403 is a very dark, muted red. Relative luminance 0.003; OKLCH L 14.7% C 0.040 H 27.8°. Best body text is #FFFFFF at 19.86:1 contrast (WCAG AA passes).

Color values

HEX	#180403
RGB	rgb(24, 4, 3)
HSL	hsl(3, 78%, 5%)
HSV	hsv(3, 88%, 9%)
CMYK	cmyk(0%, 83.3%, 87.5%, 90.6%)
CIE-LAB	lab(2.60, 6.68, 2.78)
CIE-LCH	lch(2.60, 7.24, 22.61°)
OKLab	oklab(14.68% 0.035 0.0184)
OKLCH	oklch(14.68% 0.04 27.8)
XYZ	xyz(0.4366, 0.2877, 0.1187)
Luminance	0.0029 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180403 #031718

analogous

#18030C #180403 #180E03

triadic

#180403 #031804 #040318

tetradic

#180403 #0C1803 #031718 #0E0318

square

#180403 #0C1803 #031718 #0E0318

split-complementary

#180403 #03180E #030C18

monochromatic

#1B0503 #1B0503 #1B0503 #4E0D0A #851611

Accessibility & contrast

On white

19.86

#180403 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#180403 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180403

19.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180403	#FFFFFF	#000000	##FFFFFF
##180403	1.00	19.86	1.06	19.86
#FFFFFF	19.86	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#080703

Deuteranopia (green-blind)

#0D0B03

Tritanopia (blue-blind)

#1B0204

Achromatopsia (no color)

#090909

Design tokens & code

CSS

--color: #180403;
/* rgb */ color: rgb(24, 4, 3);
/* oklch */ color: oklch(14.7% 0.040 27.8);

Tailwind

colors: {
  custom: {
    50: '#544848',
    500: '#180403',
    950: '#000000',
  },
}

SCSS

$custom: #180403;
$custom-light: #544848;
$custom-dark: #000000;

JSON

{
  "hex": "#180403",
  "rgb": {
    "r": 24,
    "g": 4,
    "b": 3
  },
  "hsl": {
    "h": 2.857,
    "s": 77.778,
    "l": 5.294
  },
  "oklch": {
    "l": 0.14681,
    "c": 0.03953,
    "h": 27.8
  },
  "luminance": 0.00288
}

Semantic roles & 50–950 ramp

primary

#180403

secondary

#1B595C

accent

#EBF434

background

#F4F4F4

surface

#E7E6E6

border

#C3C2C2

text

#020000

muted

#787777

Preview Lab

Preview with #180403

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

Preview Lab → · Contrast checker → · Palette generator →