#181C58#181C58

#181C58 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.7% C 0.106 H 273.7°. Best body text is #FFFFFF at 15.60:1 contrast (WCAG AA passes).

Color values

HEX	#181C58
RGB	rgb(24, 28, 88)
HSL	hsl(236, 57%, 22%)
HSV	hsv(236, 73%, 35%)
CMYK	cmyk(72.7%, 68.2%, 0%, 65.5%)
CIE-LAB	lab(14.00, 20.45, -36.77)
CIE-LCH	lch(14.00, 42.07, 299.08°)
OKLab	oklab(26.68% 0.0069 -0.1061)
OKLCH	oklch(26.68% 0.106 273.7)
XYZ	xyz(2.5528, 1.7290, 9.4298)
Luminance	0.0173 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C58 #585418

analogous

#183C58 #181C58 #341858

triadic

#181C58 #58181C #1C5818

tetradic

#181C58 #58183C #585418 #185834

square

#181C58 #58183C #585418 #185834

split-complementary

#181C58 #583418 #3C5818

monochromatic

#070818 #0B0D28 #181C58 #252B88 #323BB8

Accessibility & contrast

On white

15.60

#181C58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#181C58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C58

15.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C58	#FFFFFF	#000000	##FFFFFF
##181C58	1.00	15.60	1.35	15.60
#FFFFFF	15.60	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275A

Deuteranopia (green-blind)

#002157

Tritanopia (blue-blind)

#002B37

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181c58;
/* rgb */ color: rgb(24, 28, 88);
/* oklch */ color: oklch(26.7% 0.106 273.7);

Tailwind

colors: {
  custom: {
    50: '#5f5888',
    500: '#181c58',
    950: '#000000',
  },
}

SCSS

$custom: #181c58;
$custom-light: #5f5888;
$custom-dark: #000000;

JSON

{
  "hex": "#181c58",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 88
  },
  "hsl": {
    "h": 236.25,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.26684,
    "c": 0.1063,
    "h": 273.7
  },
  "luminance": 0.01729
}

Semantic roles & 50–950 ramp

primary

#181C58

secondary

#8F8A3D

accent

#D747E0

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181C58

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

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