#181788#181788

#181788 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.4% C 0.176 H 270.4°. Best body text is #FFFFFF at 13.84:1 contrast (WCAG AA passes).

Color values

HEX	#181788
RGB	rgb(24, 23, 136)
HSL	hsl(241, 71%, 31%)
HSV	hsv(241, 83%, 53%)
CMYK	cmyk(82.4%, 83.1%, 0%, 46.7%)
CIE-LAB	lab(18.29, 41.08, -60.87)
CIE-LCH	lch(18.29, 73.43, 304.02°)
OKLab	oklab(31.35% 0.0013 -0.1762)
OKLCH	oklch(31.35% 0.176 270.4)
XYZ	xyz(5.1255, 2.5840, 23.5164)
Luminance	0.0259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181788 #878817

analogous

#174E88 #181788 #501788

triadic

#181788 #881817 #178818

tetradic

#181788 #88174E #878817 #178850

square

#181788 #88174E #878817 #178850

split-complementary

#181788 #885017 #4E8817

monochromatic

#06051F #0F0E54 #181788 #2120BC #3D3BDE

Accessibility & contrast

On white

13.84

#181788 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#181788 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181788

13.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181788	#FFFFFF	#000000	##FFFFFF
##181788	1.00	13.84	1.52	13.84
#FFFFFF	13.84	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328B

Deuteranopia (green-blind)

#002786

Tritanopia (blue-blind)

#003B50

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #181788;
/* rgb */ color: rgb(24, 23, 136);
/* oklch */ color: oklch(31.4% 0.176 270.4);

Tailwind

colors: {
  custom: {
    50: '#6c57ac',
    500: '#181788',
    950: '#000000',
  },
}

SCSS

$custom: #181788;
$custom-light: #6c57ac;
$custom-dark: #000000;

JSON

{
  "hex": "#181788",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 136
  },
  "hsl": {
    "h": 240.531,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31351,
    "c": 0.17623,
    "h": 270.4
  },
  "luminance": 0.02585
}

Semantic roles & 50–950 ramp

primary

#181788

secondary

#BBBC3F

accent

#EE3AEC

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #181788

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

Preview Lab → · Contrast checker → · Palette generator →