#180503#180503

#180503 is a very dark, muted red. Relative luminance 0.003; OKLCH L 15.0% C 0.037 H 31.7°. Best body text is #FFFFFF at 19.78:1 contrast (WCAG AA passes).

Color values

HEX	#180503
RGB	rgb(24, 5, 3)
HSL	hsl(6, 78%, 5%)
HSV	hsv(6, 88%, 9%)
CMYK	cmyk(0%, 79.2%, 87.5%, 90.6%)
CIE-LAB	lab(2.79, 6.28, 3.07)
CIE-LCH	lch(2.79, 6.99, 26.04°)
OKLab	oklab(14.99% 0.0316 0.0195)
OKLCH	oklch(14.99% 0.037 31.7)
XYZ	xyz(0.4474, 0.3094, 0.1223)
Luminance	0.0031 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180503 #031618

analogous

#18030B #180503 #180F03

triadic

#180503 #031805 #050318

tetradic

#180503 #0B1803 #031618 #0F0318

square

#180503 #0B1803 #031618 #0F0318

split-complementary

#180503 #03180F #030B18

monochromatic

#1B0603 #1B0603 #1B0603 #4E100A #851C11

Accessibility & contrast

On white

19.78

#180503 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#180503 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180503

19.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180503	#FFFFFF	#000000	##FFFFFF
##180503	1.00	19.78	1.06	19.78
#FFFFFF	19.78	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#090803

Deuteranopia (green-blind)

#0E0C03

Tritanopia (blue-blind)

#1B0305

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #180503;
/* rgb */ color: rgb(24, 5, 3);
/* oklch */ color: oklch(15.0% 0.037 31.7);

Tailwind

colors: {
  custom: {
    50: '#544948',
    500: '#180503',
    950: '#000000',
  },
}

SCSS

$custom: #180503;
$custom-light: #544948;
$custom-dark: #000000;

JSON

{
  "hex": "#180503",
  "rgb": {
    "r": 24,
    "g": 5,
    "b": 3
  },
  "hsl": {
    "h": 5.714,
    "s": 77.778,
    "l": 5.294
  },
  "oklch": {
    "l": 0.14987,
    "c": 0.03718,
    "h": 31.7
  },
  "luminance": 0.00309
}

Semantic roles & 50–950 ramp

primary

#180503

secondary

#1B565C

accent

#E2F434

background

#F4F4F4

surface

#E7E6E6

border

#C3C2C2

text

#020000

muted

#787777

Preview Lab

Preview with #180503

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

Preview Lab → · Contrast checker → · Palette generator →