#181D54#181D54

#181D54 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.099 H 273.6°. Best body text is #FFFFFF at 15.64:1 contrast (WCAG AA passes).

Color values

HEX	#181D54
RGB	rgb(24, 29, 84)
HSL	hsl(235, 56%, 21%)
HSV	hsv(235, 71%, 33%)
CMYK	cmyk(71.4%, 65.5%, 0%, 67.1%)
CIE-LAB	lab(13.90, 18.12, -34.22)
CIE-LCH	lch(13.90, 38.72, 297.91°)
OKLab	oklab(26.5% 0.0062 -0.0986)
OKLCH	oklch(26.5% 0.099 273.6)
XYZ	xyz(2.4158, 1.7128, 8.5891)
Luminance	0.0171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D54 #544F18

analogous

#183B54 #181D54 #311854

triadic

#181D54 #54181D #1D5418

tetradic

#181D54 #54183B #544F18 #185431

square

#181D54 #54183B #544F18 #185431

split-complementary

#181D54 #543118 #3B5418

monochromatic

#070818 #0A0D24 #181D54 #262D84 #333EB3

Accessibility & contrast

On white

15.64

#181D54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181D54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D54

15.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D54	#FFFFFF	#000000	##FFFFFF
##181D54	1.00	15.64	1.34	15.64
#FFFFFF	15.64	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002656

Deuteranopia (green-blind)

#002153

Tritanopia (blue-blind)

#002B35

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181d54;
/* rgb */ color: rgb(24, 29, 84);
/* oklch */ color: oklch(26.5% 0.099 273.6);

Tailwind

colors: {
  custom: {
    50: '#5e5885',
    500: '#181d54',
    950: '#000000',
  },
}

SCSS

$custom: #181d54;
$custom-light: #5e5885;
$custom-dark: #000000;

JSON

{
  "hex": "#181d54",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 84
  },
  "hsl": {
    "h": 235,
    "s": 55.556,
    "l": 21.176
  },
  "oklch": {
    "l": 0.26498,
    "c": 0.09877,
    "h": 273.6
  },
  "luminance": 0.01713
}

Semantic roles & 50–950 ramp

primary

#181D54

secondary

#8B843D

accent

#D249DF

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181D54

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

Preview Lab → · Contrast checker → · Palette generator →