#181C53#181C53

#181C53 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.2% C 0.099 H 274.2°. Best body text is #FFFFFF at 15.79:1 contrast (WCAG AA passes).

Color values

HEX	#181C53
RGB	rgb(24, 28, 83)
HSL	hsl(236, 55%, 21%)
HSV	hsv(236, 71%, 33%)
CMYK	cmyk(71.1%, 66.3%, 0%, 67.5%)
CIE-LAB	lab(13.53, 18.45, -34.15)
CIE-LCH	lch(13.53, 38.82, 298.38°)
OKLab	oklab(26.19% 0.0072 -0.0984)
OKLCH	oklch(26.19% 0.099 274.2)
XYZ	xyz(2.3528, 1.6490, 8.3762)
Luminance	0.0165 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C53 #534F18

analogous

#183953 #181C53 #311853

triadic

#181C53 #53181C #1C5318

tetradic

#181C53 #531839 #534F18 #185331

square

#181C53 #531839 #534F18 #185331

split-complementary

#181C53 #533118 #395318

monochromatic

#070818 #0A0C24 #181C53 #262C82 #333CB2

Accessibility & contrast

On white

15.79

#181C53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#181C53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C53

15.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C53	#FFFFFF	#000000	##FFFFFF
##181C53	1.00	15.79	1.33	15.79
#FFFFFF	15.79	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002555

Deuteranopia (green-blind)

#002052

Tritanopia (blue-blind)

#002A34

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181c53;
/* rgb */ color: rgb(24, 28, 83);
/* oklch */ color: oklch(26.2% 0.099 274.2);

Tailwind

colors: {
  custom: {
    50: '#5d5884',
    500: '#181c53',
    950: '#000000',
  },
}

SCSS

$custom: #181c53;
$custom-light: #5d5884;
$custom-dark: #000000;

JSON

{
  "hex": "#181c53",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 83
  },
  "hsl": {
    "h": 235.932,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.26192,
    "c": 0.09865,
    "h": 274.2
  },
  "luminance": 0.01649
}

Semantic roles & 50–950 ramp

primary

#181C53

secondary

#8A853D

accent

#D449DE

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181C53

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

Preview Lab → · Contrast checker → · Palette generator →