#181D53#181D53

#181D53 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.4% C 0.097 H 273.7°. Best body text is #FFFFFF at 15.68:1 contrast (WCAG AA passes).

Color values

HEX	#181D53
RGB	rgb(24, 29, 83)
HSL	hsl(235, 55%, 21%)
HSV	hsv(235, 71%, 33%)
CMYK	cmyk(71.1%, 65.1%, 0%, 67.5%)
CIE-LAB	lab(13.81, 17.72, -33.69)
CIE-LCH	lch(13.81, 38.07, 297.75°)
OKLab	oklab(26.4% 0.0062 -0.097)
OKLCH	oklch(26.4% 0.097 273.7)
XYZ	xyz(2.3769, 1.6972, 8.3843)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D53 #534E18

analogous

#183A53 #181D53 #301853

triadic

#181D53 #53181D #1D5318

tetradic

#181D53 #53183A #534E18 #185330

square

#181D53 #53183A #534E18 #185330

split-complementary

#181D53 #533018 #3A5318

monochromatic

#070818 #0A0C24 #181D53 #262E82 #333EB2

Accessibility & contrast

On white

15.68

#181D53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181D53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D53

15.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D53	#FFFFFF	#000000	##FFFFFF
##181D53	1.00	15.68	1.34	15.68
#FFFFFF	15.68	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002655

Deuteranopia (green-blind)

#002152

Tritanopia (blue-blind)

#002A34

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181d53;
/* rgb */ color: rgb(24, 29, 83);
/* oklch */ color: oklch(26.4% 0.097 273.7);

Tailwind

colors: {
  custom: {
    50: '#5d5884',
    500: '#181d53',
    950: '#000000',
  },
}

SCSS

$custom: #181d53;
$custom-light: #5d5884;
$custom-dark: #000000;

JSON

{
  "hex": "#181d53",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 83
  },
  "hsl": {
    "h": 234.915,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.26403,
    "c": 0.09722,
    "h": 273.7
  },
  "luminance": 0.01697
}

Semantic roles & 50–950 ramp

primary

#181D53

secondary

#8A833D

accent

#D249DE

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181D53

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

Preview Lab → · Contrast checker → · Palette generator →