#181B68#181B68

#181B68 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.2% C 0.131 H 272.6°. Best body text is #FFFFFF at 15.05:1 contrast (WCAG AA passes).

Color values

HEX	#181B68
RGB	rgb(24, 27, 104)
HSL	hsl(238, 63%, 25%)
HSV	hsv(238, 77%, 41%)
CMYK	cmyk(76.9%, 74%, 0%, 59.2%)
CIE-LAB	lab(15.37, 27.36, -45.16)
CIE-LCH	lch(15.37, 52.80, 301.21°)
OKLab	oklab(28.18% 0.0059 -0.1306)
OKLCH	oklch(28.18% 0.131 272.6)
XYZ	xyz(3.2665, 1.9772, 13.3035)
Luminance	0.0198 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B68 #686518

analogous

#184368 #181B68 #3D1868

triadic

#181B68 #68181B #1B6818

tetradic

#181B68 #681843 #686518 #18683D

square

#181B68 #681843 #686518 #18683D

split-complementary

#181B68 #683D18 #436818

monochromatic

#060619 #0D0E36 #181B68 #23289A #2F35CB

Accessibility & contrast

On white

15.05

#181B68 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#181B68 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B68

15.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B68	#FFFFFF	#000000	##FFFFFF
##181B68	1.00	15.05	1.40	15.05
#FFFFFF	15.05	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A6A

Deuteranopia (green-blind)

#002367

Tritanopia (blue-blind)

#00303F

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181b68;
/* rgb */ color: rgb(24, 27, 104);
/* oklch */ color: oklch(28.2% 0.131 272.6);

Tailwind

colors: {
  custom: {
    50: '#635894',
    500: '#181b68',
    950: '#000000',
  },
}

SCSS

$custom: #181b68;
$custom-light: #635894;
$custom-dark: #000000;

JSON

{
  "hex": "#181b68",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 104
  },
  "hsl": {
    "h": 237.75,
    "s": 62.5,
    "l": 25.098
  },
  "oklch": {
    "l": 0.28178,
    "c": 0.13076,
    "h": 272.6
  },
  "luminance": 0.01978
}

Semantic roles & 50–950 ramp

primary

#181B68

secondary

#9E9A3E

accent

#DF42E6

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #181B68

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

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