#181F5A#181F5A

#181F5A is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.5% C 0.105 H 272.3°. Best body text is #FFFFFF at 15.19:1 contrast (WCAG AA passes).

Color values

HEX	#181F5A
RGB	rgb(24, 31, 90)
HSL	hsl(234, 58%, 22%)
HSV	hsv(234, 73%, 35%)
CMYK	cmyk(73.3%, 65.6%, 0%, 64.7%)
CIE-LAB	lab(15.02, 19.08, -36.44)
CIE-LCH	lch(15.02, 41.13, 297.63°)
OKLab	oklab(27.5% 0.0042 -0.1051)
OKLCH	oklch(27.5% 0.105 272.3)
XYZ	xyz(2.7115, 1.9121, 9.8971)
Luminance	0.0191 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F5A #5A5318

analogous

#18405A #181F5A #32185A

triadic

#181F5A #5A181F #1F5A18

tetradic

#181F5A #5A1840 #5A5318 #185A32

square

#181F5A #5A1840 #5A5318 #185A32

split-complementary

#181F5A #5A3218 #405A18

monochromatic

#060818 #0B0E2A #181F5A #25308A #3240BB

Accessibility & contrast

On white

15.19

#181F5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#181F5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F5A

15.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F5A	#FFFFFF	#000000	##FFFFFF
##181F5A	1.00	15.19	1.38	15.19
#FFFFFF	15.19	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00295C

Deuteranopia (green-blind)

#002359

Tritanopia (blue-blind)

#002E39

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181f5a;
/* rgb */ color: rgb(24, 31, 90);
/* oklch */ color: oklch(27.5% 0.105 272.3);

Tailwind

colors: {
  custom: {
    50: '#5f5a89',
    500: '#181f5a',
    950: '#000000',
  },
}

SCSS

$custom: #181f5a;
$custom-light: #5f5a89;
$custom-dark: #000000;

JSON

{
  "hex": "#181f5a",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 90
  },
  "hsl": {
    "h": 233.636,
    "s": 57.895,
    "l": 22.353
  },
  "oklch": {
    "l": 0.27496,
    "c": 0.10517,
    "h": 272.3
  },
  "luminance": 0.01912
}

Semantic roles & 50–950 ramp

primary

#181F5A

secondary

#91883D

accent

#D147E1

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181F5A

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

Preview Lab → · Contrast checker → · Palette generator →