#181C64#181C64

#181C64 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.9% C 0.124 H 272.7°. Best body text is #FFFFFF at 15.12:1 contrast (WCAG AA passes).

Color values

HEX	#181C64
RGB	rgb(24, 28, 100)
HSL	hsl(237, 61%, 24%)
HSV	hsv(237, 76%, 39%)
CMYK	cmyk(76%, 72%, 0%, 60.8%)
CIE-LAB	lab(15.19, 25.15, -42.81)
CIE-LCH	lch(15.19, 49.65, 300.43°)
OKLab	oklab(27.93% 0.0058 -0.1238)
OKLCH	oklch(27.93% 0.124 272.7)
XYZ	xyz(3.0914, 1.9445, 12.2665)
Luminance	0.0194 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C64 #646018

analogous

#184264 #181C64 #3A1864

triadic

#181C64 #64181C #1C6418

tetradic

#181C64 #641842 #646018 #18643A

square

#181C64 #641842 #646018 #18643A

split-complementary

#181C64 #643A18 #426418

monochromatic

#060719 #0C0E33 #181C64 #242A95 #3038C7

Accessibility & contrast

On white

15.12

#181C64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#181C64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C64

15.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C64	#FFFFFF	#000000	##FFFFFF
##181C64	1.00	15.12	1.39	15.12
#FFFFFF	15.12	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A66

Deuteranopia (green-blind)

#002363

Tritanopia (blue-blind)

#002F3D

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181c64;
/* rgb */ color: rgb(24, 28, 100);
/* oklch */ color: oklch(27.9% 0.124 272.7);

Tailwind

colors: {
  custom: {
    50: '#625891',
    500: '#181c64',
    950: '#000000',
  },
}

SCSS

$custom: #181c64;
$custom-light: #625891;
$custom-dark: #000000;

JSON

{
  "hex": "#181c64",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 100
  },
  "hsl": {
    "h": 236.842,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.27925,
    "c": 0.12391,
    "h": 272.7
  },
  "luminance": 0.01945
}

Semantic roles & 50–950 ramp

primary

#181C64

secondary

#9A953E

accent

#DC43E4

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #181C64

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

Preview Lab → · Contrast checker → · Palette generator →