#181888#181888

#181888 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.5% C 0.175 H 270.4°. Best body text is #FFFFFF at 13.77:1 contrast (WCAG AA passes).

Color values

HEX	#181888
RGB	rgb(24, 24, 136)
HSL	hsl(240, 70%, 31%)
HSV	hsv(240, 82%, 53%)
CMYK	cmyk(82.4%, 82.4%, 0%, 46.7%)
CIE-LAB	lab(18.47, 40.56, -60.57)
CIE-LCH	lch(18.47, 72.90, 303.81°)
OKLab	oklab(31.48% 0.0011 -0.1754)
OKLCH	oklch(31.48% 0.175 270.4)
XYZ	xyz(5.1457, 2.6244, 23.5231)
Luminance	0.0262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181888 #888818

analogous

#185088 #181888 #501888

triadic

#181888 #881818 #188818

tetradic

#181888 #881850 #888818 #188850

square

#181888 #881850 #888818 #188850

split-complementary

#181888 #885018 #508818

monochromatic

#060620 #0F0F54 #181888 #2121BC #3E3EDD

Accessibility & contrast

On white

13.77

#181888 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#181888 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181888

13.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181888	#FFFFFF	#000000	##FFFFFF
##181888	1.00	13.77	1.53	13.77
#FFFFFF	13.77	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338B

Deuteranopia (green-blind)

#002786

Tritanopia (blue-blind)

#003B50

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #181888;
/* rgb */ color: rgb(24, 24, 136);
/* oklch */ color: oklch(31.5% 0.175 270.4);

Tailwind

colors: {
  custom: {
    50: '#6c58ac',
    500: '#181888',
    950: '#000000',
  },
}

SCSS

$custom: #181888;
$custom-light: #6c58ac;
$custom-dark: #000000;

JSON

{
  "hex": "#181888",
  "rgb": {
    "r": 24,
    "g": 24,
    "b": 136
  },
  "hsl": {
    "h": 240,
    "s": 70,
    "l": 31.373
  },
  "oklch": {
    "l": 0.31475,
    "c": 0.17538,
    "h": 270.4
  },
  "luminance": 0.02625
}

Semantic roles & 50–950 ramp

primary

#181888

secondary

#BCBC40

accent

#ED3BED

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #181888

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

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