#181C5A#181C5A

#181C5A is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.9% C 0.109 H 273.6°. Best body text is #FFFFFF at 15.53:1 contrast (WCAG AA passes).

Color values

HEX	#181C5A
RGB	rgb(24, 28, 90)
HSL	hsl(236, 58%, 22%)
HSV	hsv(236, 73%, 35%)
CMYK	cmyk(73.3%, 68.9%, 0%, 64.7%)
CIE-LAB	lab(14.19, 21.24, -37.80)
CIE-LCH	lch(14.19, 43.36, 299.33°)
OKLab	oklab(26.89% 0.0068 -0.1091)
OKLCH	oklch(26.89% 0.109 273.6)
XYZ	xyz(2.6368, 1.7626, 9.8721)
Luminance	0.0176 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C5A #5A5618

analogous

#183D5A #181C5A #35185A

triadic

#181C5A #5A181C #1C5A18

tetradic

#181C5A #5A183D #5A5618 #185A35

square

#181C5A #5A183D #5A5618 #185A35

split-complementary

#181C5A #5A3518 #3D5A18

monochromatic

#060818 #0B0D2A #181C5A #252B8A #323ABB

Accessibility & contrast

On white

15.53

#181C5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#181C5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C5A

15.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C5A	#FFFFFF	#000000	##FFFFFF
##181C5A	1.00	15.53	1.35	15.53
#FFFFFF	15.53	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275C

Deuteranopia (green-blind)

#002159

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181c5a;
/* rgb */ color: rgb(24, 28, 90);
/* oklch */ color: oklch(26.9% 0.109 273.6);

Tailwind

colors: {
  custom: {
    50: '#5f5889',
    500: '#181c5a',
    950: '#000000',
  },
}

SCSS

$custom: #181c5a;
$custom-light: #5f5889;
$custom-dark: #000000;

JSON

{
  "hex": "#181c5a",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 90
  },
  "hsl": {
    "h": 236.364,
    "s": 57.895,
    "l": 22.353
  },
  "oklch": {
    "l": 0.26885,
    "c": 0.1093,
    "h": 273.6
  },
  "luminance": 0.01763
}

Semantic roles & 50–950 ramp

primary

#181C5A

secondary

#918C3D

accent

#D847E1

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #181C5A

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

Preview Lab → · Contrast checker → · Palette generator →