#180000#180000

#180000 is a very dark, muted red. Relative luminance 0.002; OKLCH L 13.1% C 0.054 H 29.2°. Best body text is #FFFFFF at 20.22:1 contrast (WCAG AA passes).

Color values

HEX	#180000
RGB	rgb(24, 0, 0)
HSL	hsl(0, 100%, 5%)
HSV	hsv(0, 100%, 9%)
CMYK	cmyk(0%, 100%, 100%, 90.6%)
CIE-LAB	lab(1.76, 7.87, 2.77)
CIE-LCH	lch(1.76, 8.34, 19.42°)
OKLab	oklab(13.13% 0.047 0.0263)
OKLCH	oklch(13.13% 0.054 29.2)
XYZ	xyz(0.3767, 0.1943, 0.0177)
Luminance	0.0019 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180000 #001818

analogous

#18000C #180000 #180C00

triadic

#180000 #001800 #000018

tetradic

#180000 #0C1800 #001818 #0C0018

square

#180000 #0C1800 #001818 #0C0018

split-complementary

#180000 #00180C #000C18

monochromatic

#1F0000 #1F0000 #1F0000 #550000 #920000

Accessibility & contrast

On white

20.22

#180000 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.04

#180000 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180000

20.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180000	#FFFFFF	#000000	##FFFFFF
##180000	1.00	20.22	1.04	20.22
#FFFFFF	20.22	1.00	21.00	1.00
#000000	1.04	21.00	1.00	21.00
##FFFFFF	20.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#050300

Deuteranopia (green-blind)

#0B0800

Tritanopia (blue-blind)

#1C0000

Achromatopsia (no color)

#060606

Design tokens & code

CSS

--color: #180000;
/* rgb */ color: rgb(24, 0, 0);
/* oklch */ color: oklch(13.1% 0.054 29.2);

Tailwind

colors: {
  custom: {
    50: '#534647',
    500: '#180000',
    950: '#000000',
  },
}

SCSS

$custom: #180000;
$custom-light: #534647;
$custom-dark: #000000;

JSON

{
  "hex": "#180000",
  "rgb": {
    "r": 24,
    "g": 0,
    "b": 0
  },
  "hsl": {
    "h": 0,
    "s": 100,
    "l": 4.706
  },
  "oklch": {
    "l": 0.13127,
    "c": 0.05386,
    "h": 29.2
  },
  "luminance": 0.00194
}

Semantic roles & 50–950 ramp

primary

#180000

secondary

#116262

accent

#FFFF29

background

#F4F3F3

surface

#E7E5E5

border

#C3C1C1

text

#020000

muted

#787777

Preview Lab

Preview with #180000

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

Preview Lab → · Contrast checker → · Palette generator →