#181C5E#181C5E

#181C5E is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.3% C 0.115 H 273.2°. Best body text is #FFFFFF at 15.37:1 contrast (WCAG AA passes).

Color values

HEX	#181C5E
RGB	rgb(24, 28, 94)
HSL	hsl(237, 59%, 23%)
HSV	hsv(237, 74%, 37%)
CMYK	cmyk(74.5%, 70.2%, 0%, 63.1%)
CIE-LAB	lab(14.58, 22.81, -39.83)
CIE-LCH	lch(14.58, 45.90, 299.80°)
OKLab	oklab(27.3% 0.0064 -0.115)
OKLCH	oklch(27.3% 0.115 273.2)
XYZ	xyz(2.8116, 1.8326, 10.7931)
Luminance	0.0183 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C5E #5E5A18

analogous

#183F5E #181C5E #37185E

triadic

#181C5E #5E181C #1C5E18

tetradic

#181C5E #5E183F #5E5A18 #185E37

square

#181C5E #5E183F #5E5A18 #185E37

split-complementary

#181C5E #5E3718 #3F5E18

monochromatic

#060718 #0C0D2D #181C5E #242B8F #3139C0

Accessibility & contrast

On white

15.37

#181C5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#181C5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C5E

15.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C5E	#FFFFFF	#000000	##FFFFFF
##181C5E	1.00	15.37	1.37	15.37
#FFFFFF	15.37	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002860

Deuteranopia (green-blind)

#00225D

Tritanopia (blue-blind)

#002D3A

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181c5e;
/* rgb */ color: rgb(24, 28, 94);
/* oklch */ color: oklch(27.3% 0.115 273.2);

Tailwind

colors: {
  custom: {
    50: '#60588c',
    500: '#181c5e',
    950: '#000000',
  },
}

SCSS

$custom: #181c5e;
$custom-light: #60588c;
$custom-dark: #000000;

JSON

{
  "hex": "#181c5e",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 94
  },
  "hsl": {
    "h": 236.571,
    "s": 59.322,
    "l": 23.137
  },
  "oklch": {
    "l": 0.27295,
    "c": 0.11523,
    "h": 273.2
  },
  "luminance": 0.01833
}

Semantic roles & 50–950 ramp

primary

#181C5E

secondary

#948F3D

accent

#DA45E3

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181C5E

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

Preview Lab → · Contrast checker → · Palette generator →