#181B54#181B54

#181B54 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.1% C 0.102 H 274.6°. Best body text is #FFFFFF at 15.87:1 contrast (WCAG AA passes).

Color values

HEX	#181B54
RGB	rgb(24, 27, 84)
HSL	hsl(237, 56%, 21%)
HSV	hsv(237, 71%, 33%)
CMYK	cmyk(71.4%, 67.9%, 0%, 67.1%)
CIE-LAB	lab(13.34, 19.58, -35.14)
CIE-LCH	lch(13.34, 40.22, 299.13°)
OKLab	oklab(26.08% 0.0081 -0.1013)
OKLCH	oklch(26.08% 0.102 274.6)
XYZ	xyz(2.3683, 1.6179, 8.5733)
Luminance	0.0162 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B54 #545118

analogous

#183954 #181B54 #331854

triadic

#181B54 #54181B #1B5418

tetradic

#181B54 #541839 #545118 #185433

square

#181B54 #541839 #545118 #185433

split-complementary

#181B54 #543318 #395418

monochromatic

#070818 #0A0C24 #181B54 #262A84 #333AB3

Accessibility & contrast

On white

15.87

#181B54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181B54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B54

15.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B54	#FFFFFF	#000000	##FFFFFF
##181B54	1.00	15.87	1.32	15.87
#FFFFFF	15.87	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002556

Deuteranopia (green-blind)

#002053

Tritanopia (blue-blind)

#002934

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181b54;
/* rgb */ color: rgb(24, 27, 84);
/* oklch */ color: oklch(26.1% 0.102 274.6);

Tailwind

colors: {
  custom: {
    50: '#5e5785',
    500: '#181b54',
    950: '#000000',
  },
}

SCSS

$custom: #181b54;
$custom-light: #5e5785;
$custom-dark: #000000;

JSON

{
  "hex": "#181b54",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 84
  },
  "hsl": {
    "h": 237,
    "s": 55.556,
    "l": 21.176
  },
  "oklch": {
    "l": 0.26084,
    "c": 0.10161,
    "h": 274.6
  },
  "luminance": 0.01618
}

Semantic roles & 50–950 ramp

primary

#181B54

secondary

#8B873D

accent

#D749DF

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181B54

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

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