#181B52#181B52

#181B52 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.9% C 0.099 H 274.8°. Best body text is #FFFFFF at 15.94:1 contrast (WCAG AA passes).

Color values

HEX	#181B52
RGB	rgb(24, 27, 82)
HSL	hsl(237, 55%, 21%)
HSV	hsv(237, 71%, 32%)
CMYK	cmyk(70.7%, 67.1%, 0%, 67.8%)
CIE-LAB	lab(13.15, 18.78, -34.08)
CIE-LCH	lch(13.15, 38.92, 298.86°)
OKLab	oklab(25.89% 0.0082 -0.0982)
OKLCH	oklch(25.89% 0.099 274.8)
XYZ	xyz(2.2911, 1.5871, 8.1666)
Luminance	0.0159 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B52 #524F18

analogous

#183852 #181B52 #321852

triadic

#181B52 #52181B #1B5218

tetradic

#181B52 #521838 #524F18 #185232

square

#181B52 #521838 #524F18 #185232

split-complementary

#181B52 #523218 #385218

monochromatic

#070818 #0A0B23 #181B52 #262B81 #343AB1

Accessibility & contrast

On white

15.94

#181B52 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181B52 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B52

15.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B52	#FFFFFF	#000000	##FFFFFF
##181B52	1.00	15.94	1.32	15.94
#FFFFFF	15.94	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002454

Deuteranopia (green-blind)

#001F51

Tritanopia (blue-blind)

#002933

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181b52;
/* rgb */ color: rgb(24, 27, 82);
/* oklch */ color: oklch(25.9% 0.099 274.8);

Tailwind

colors: {
  custom: {
    50: '#5d5783',
    500: '#181b52',
    950: '#000000',
  },
}

SCSS

$custom: #181b52;
$custom-light: #5d5783;
$custom-dark: #000000;

JSON

{
  "hex": "#181b52",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 82
  },
  "hsl": {
    "h": 236.897,
    "s": 54.717,
    "l": 20.784
  },
  "oklch": {
    "l": 0.25887,
    "c": 0.09854,
    "h": 274.8
  },
  "luminance": 0.01587
}

Semantic roles & 50–950 ramp

primary

#181B52

secondary

#89853D

accent

#D64ADE

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181B52

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

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