#181A5A#181A5A

#181A5A is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.112 H 274.3°. Best body text is #FFFFFF at 15.74:1 contrast (WCAG AA passes).

Color values

HEX	#181A5A
RGB	rgb(24, 26, 90)
HSL	hsl(238, 58%, 22%)
HSV	hsv(238, 73%, 35%)
CMYK	cmyk(73.3%, 71.1%, 0%, 64.7%)
CIE-LAB	lab(13.66, 22.65, -38.67)
CIE-LCH	lch(13.66, 44.82, 300.36°)
OKLab	oklab(26.5% 0.0084 -0.1117)
OKLCH	oklch(26.5% 0.112 274.3)
XYZ	xyz(2.5909, 1.6709, 9.8569)
Luminance	0.0167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181A5A #5A5818

analogous

#183B5A #181A5A #37185A

triadic

#181A5A #5A181A #1A5A18

tetradic

#181A5A #5A183B #5A5818 #185A37

square

#181A5A #5A183B #5A5818 #185A37

split-complementary

#181A5A #5A3718 #3B5A18

monochromatic

#060718 #0B0C2A #181A5A #25288A #3236BB

Accessibility & contrast

On white

15.74

#181A5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#181A5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181A5A

15.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181A5A	#FFFFFF	#000000	##FFFFFF
##181A5A	1.00	15.74	1.33	15.74
#FFFFFF	15.74	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265C

Deuteranopia (green-blind)

#002059

Tritanopia (blue-blind)

#002B37

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181a5a;
/* rgb */ color: rgb(24, 26, 90);
/* oklch */ color: oklch(26.5% 0.112 274.3);

Tailwind

colors: {
  custom: {
    50: '#5f5689',
    500: '#181a5a',
    950: '#000000',
  },
}

SCSS

$custom: #181a5a;
$custom-light: #5f5689;
$custom-dark: #000000;

JSON

{
  "hex": "#181a5a",
  "rgb": {
    "r": 24,
    "g": 26,
    "b": 90
  },
  "hsl": {
    "h": 238.182,
    "s": 57.895,
    "l": 22.353
  },
  "oklch": {
    "l": 0.26497,
    "c": 0.11198,
    "h": 274.3
  },
  "luminance": 0.01671
}

Semantic roles & 50–950 ramp

primary

#181A5A

secondary

#918E3D

accent

#DC47E1

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #181A5A

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

Preview Lab → · Contrast checker → · Palette generator →