#181D55#181D55

#181D55 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.100 H 273.5°. Best body text is #FFFFFF at 15.60:1 contrast (WCAG AA passes).

Color values

HEX	#181D55
RGB	rgb(24, 29, 85)
HSL	hsl(235, 56%, 21%)
HSV	hsv(235, 72%, 33%)
CMYK	cmyk(71.8%, 65.9%, 0%, 66.7%)
CIE-LAB	lab(13.99, 18.52, -34.75)
CIE-LCH	lch(13.99, 39.38, 298.06°)
OKLab	oklab(26.6% 0.0062 -0.1001)
OKLCH	oklch(26.6% 0.1 273.5)
XYZ	xyz(2.4552, 1.7286, 8.7968)
Luminance	0.0173 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D55 #555018

analogous

#183C55 #181D55 #321855

triadic

#181D55 #55181D #1D5518

tetradic

#181D55 #55183C #555018 #185532

square

#181D55 #55183C #555018 #185532

split-complementary

#181D55 #553218 #3C5518

monochromatic

#070818 #0B0D25 #181D55 #252D85 #333EB4

Accessibility & contrast

On white

15.60

#181D55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#181D55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D55

15.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D55	#FFFFFF	#000000	##FFFFFF
##181D55	1.00	15.60	1.35	15.60
#FFFFFF	15.60	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002657

Deuteranopia (green-blind)

#002154

Tritanopia (blue-blind)

#002B35

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181d55;
/* rgb */ color: rgb(24, 29, 85);
/* oklch */ color: oklch(26.6% 0.100 273.5);

Tailwind

colors: {
  custom: {
    50: '#5e5885',
    500: '#181d55',
    950: '#000000',
  },
}

SCSS

$custom: #181d55;
$custom-light: #5e5885;
$custom-dark: #000000;

JSON

{
  "hex": "#181d55",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 85
  },
  "hsl": {
    "h": 235.082,
    "s": 55.963,
    "l": 21.373
  },
  "oklch": {
    "l": 0.26595,
    "c": 0.10032,
    "h": 273.5
  },
  "luminance": 0.01729
}

Semantic roles & 50–950 ramp

primary

#181D55

secondary

#8C853D

accent

#D349DF

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181D55

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

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