#181E55#181E55

#181E55 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.8% C 0.099 H 273.0°. Best body text is #FFFFFF at 15.49:1 contrast (WCAG AA passes).

Color values

HEX	#181E55
RGB	rgb(24, 30, 85)
HSL	hsl(234, 56%, 21%)
HSV	hsv(234, 72%, 33%)
CMYK	cmyk(71.8%, 64.7%, 0%, 66.7%)
CIE-LAB	lab(14.28, 17.79, -34.28)
CIE-LCH	lch(14.28, 38.62, 297.43°)
OKLab	oklab(26.81% 0.0052 -0.0988)
OKLCH	oklch(26.81% 0.099 273)
XYZ	xyz(2.4801, 1.7784, 8.8051)
Luminance	0.0178 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181E55 #554F18

analogous

#183D55 #181E55 #311855

triadic

#181E55 #55181E #1E5518

tetradic

#181E55 #55183D #554F18 #185531

square

#181E55 #55183D #554F18 #185531

split-complementary

#181E55 #553118 #3D5518

monochromatic

#070818 #0B0D25 #181E55 #252F85 #3340B4

Accessibility & contrast

On white

15.49

#181E55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#181E55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181E55

15.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181E55	#FFFFFF	#000000	##FFFFFF
##181E55	1.00	15.49	1.36	15.49
#FFFFFF	15.49	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002757

Deuteranopia (green-blind)

#002154

Tritanopia (blue-blind)

#002C36

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181e55;
/* rgb */ color: rgb(24, 30, 85);
/* oklch */ color: oklch(26.8% 0.099 273.0);

Tailwind

colors: {
  custom: {
    50: '#5e5985',
    500: '#181e55',
    950: '#000000',
  },
}

SCSS

$custom: #181e55;
$custom-light: #5e5985;
$custom-dark: #000000;

JSON

{
  "hex": "#181e55",
  "rgb": {
    "r": 24,
    "g": 30,
    "b": 85
  },
  "hsl": {
    "h": 234.098,
    "s": 55.963,
    "l": 21.373
  },
  "oklch": {
    "l": 0.26806,
    "c": 0.0989,
    "h": 273
  },
  "luminance": 0.01779
}

Semantic roles & 50–950 ramp

primary

#181E55

secondary

#8C843D

accent

#D049DF

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181E55

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

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