#181840#181840

#181840 is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.6% C 0.074 H 279.1°. Best body text is #FFFFFF at 16.89:1 contrast (WCAG AA passes).

Color values

HEX	#181840
RGB	rgb(24, 24, 64)
HSL	hsl(240, 45%, 17%)
HSV	hsv(240, 63%, 25%)
CMYK	cmyk(62.5%, 62.5%, 0%, 74.9%)
CIE-LAB	lab(10.69, 13.87, -25.60)
CIE-LCH	lch(10.69, 29.12, 298.45°)
OKLab	oklab(23.56% 0.0117 -0.0733)
OKLCH	oklch(23.56% 0.074 279.1)
XYZ	xyz(1.6284, 1.2175, 4.9987)
Luminance	0.0122 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181840 #404018

analogous

#182C40 #181840 #2C1840

triadic

#181840 #401818 #184018

tetradic

#181840 #40182C #404018 #18402C

square

#181840 #40182C #404018 #18402C

split-complementary

#181840 #402C18 #2C4018

monochromatic

#080816 #080816 #181840 #29296D #393999

Accessibility & contrast

On white

16.89

#181840 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#181840 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181840

16.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181840	#FFFFFF	#000000	##FFFFFF
##181840	1.00	16.89	1.24	16.89
#FFFFFF	16.89	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#021E41

Deuteranopia (green-blind)

#001B3F

Tritanopia (blue-blind)

#052129

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #181840;
/* rgb */ color: rgb(24, 24, 64);
/* oklch */ color: oklch(23.6% 0.074 279.1);

Tailwind

colors: {
  custom: {
    50: '#595475',
    500: '#181840',
    950: '#000000',
  },
}

SCSS

$custom: #181840;
$custom-light: #595475;
$custom-dark: #000000;

JSON

{
  "hex": "#181840",
  "rgb": {
    "r": 24,
    "g": 24,
    "b": 64
  },
  "hsl": {
    "h": 240,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.2356,
    "c": 0.07422,
    "h": 279.1
  },
  "luminance": 0.01218
}

Semantic roles & 50–950 ramp

primary

#181840

secondary

#77773D

accent

#D553D5

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #181840

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

Preview Lab → · Contrast checker → · Palette generator →