#181B64#181B64

#181B64 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.7% C 0.125 H 273.0°. Best body text is #FFFFFF at 15.22:1 contrast (WCAG AA passes).

Color values

HEX	#181B64
RGB	rgb(24, 27, 100)
HSL	hsl(238, 61%, 24%)
HSV	hsv(238, 76%, 39%)
CMYK	cmyk(76%, 73%, 0%, 60.8%)
CIE-LAB	lab(14.94, 25.83, -43.23)
CIE-LCH	lch(14.94, 50.36, 300.86°)
OKLab	oklab(27.74% 0.0065 -0.125)
OKLCH	oklch(27.74% 0.125 273)
XYZ	xyz(3.0681, 1.8979, 12.2588)
Luminance	0.0190 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B64 #646118

analogous

#184164 #181B64 #3B1864

triadic

#181B64 #64181B #1B6418

tetradic

#181B64 #641841 #646118 #18643B

square

#181B64 #641841 #646118 #18643B

split-complementary

#181B64 #643B18 #416418

monochromatic

#060719 #0C0E33 #181B64 #242895 #3036C7

Accessibility & contrast

On white

15.22

#181B64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#181B64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B64

15.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B64	#FFFFFF	#000000	##FFFFFF
##181B64	1.00	15.22	1.38	15.22
#FFFFFF	15.22	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002966

Deuteranopia (green-blind)

#002263

Tritanopia (blue-blind)

#002F3D

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181b64;
/* rgb */ color: rgb(24, 27, 100);
/* oklch */ color: oklch(27.7% 0.125 273.0);

Tailwind

colors: {
  custom: {
    50: '#625791',
    500: '#181b64',
    950: '#000000',
  },
}

SCSS

$custom: #181b64;
$custom-light: #625791;
$custom-dark: #000000;

JSON

{
  "hex": "#181b64",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 100
  },
  "hsl": {
    "h": 237.632,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.27743,
    "c": 0.12515,
    "h": 273
  },
  "luminance": 0.01898
}

Semantic roles & 50–950 ramp

primary

#181B64

secondary

#9A973E

accent

#DE43E4

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #181B64

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

Preview Lab → · Contrast checker → · Palette generator →