#181A53#181A53

#181A53 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.8% C 0.101 H 275.1°. Best body text is #FFFFFF at 16.01:1 contrast (WCAG AA passes).

Color values

HEX	#181A53
RGB	rgb(24, 26, 83)
HSL	hsl(238, 55%, 21%)
HSV	hsv(238, 71%, 33%)
CMYK	cmyk(71.1%, 68.7%, 0%, 67.5%)
CIE-LAB	lab(12.97, 19.90, -35.06)
CIE-LCH	lch(12.97, 40.32, 299.58°)
OKLab	oklab(25.78% 0.0091 -0.1011)
OKLCH	oklch(25.78% 0.101 275.1)
XYZ	xyz(2.3069, 1.5573, 8.3610)
Luminance	0.0156 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181A53 #535118

analogous

#183753 #181A53 #331853

triadic

#181A53 #53181A #1A5318

tetradic

#181A53 #531837 #535118 #185333

square

#181A53 #531837 #535118 #185333

split-complementary

#181A53 #533318 #375318

monochromatic

#070718 #0A0B24 #181A53 #262982 #3338B2

Accessibility & contrast

On white

16.01

#181A53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181A53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181A53

16.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181A53	#FFFFFF	#000000	##FFFFFF
##181A53	1.00	16.01	1.31	16.01
#FFFFFF	16.01	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002455

Deuteranopia (green-blind)

#001F52

Tritanopia (blue-blind)

#002833

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181a53;
/* rgb */ color: rgb(24, 26, 83);
/* oklch */ color: oklch(25.8% 0.101 275.1);

Tailwind

colors: {
  custom: {
    50: '#5e5684',
    500: '#181a53',
    950: '#000000',
  },
}

SCSS

$custom: #181a53;
$custom-light: #5e5684;
$custom-dark: #000000;

JSON

{
  "hex": "#181a53",
  "rgb": {
    "r": 24,
    "g": 26,
    "b": 83
  },
  "hsl": {
    "h": 237.966,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.25782,
    "c": 0.10149,
    "h": 275.1
  },
  "luminance": 0.01558
}

Semantic roles & 50–950 ramp

primary

#181A53

secondary

#8A873D

accent

#D949DE

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181A53

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

Preview Lab → · Contrast checker → · Palette generator →