#181A8B#181A8B

#181A8B is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.177 H 270.0°. Best body text is #FFFFFF at 13.47:1 contrast (WCAG AA passes).

Color values

HEX	#181A8B
RGB	rgb(24, 26, 139)
HSL	hsl(239, 71%, 32%)
HSV	hsv(239, 83%, 55%)
CMYK	cmyk(82.7%, 81.3%, 0%, 45.5%)
CIE-LAB	lab(19.21, 40.51, -61.23)
CIE-LCH	lch(19.21, 73.42, 303.49°)
OKLab	oklab(32.1% -0.0001 -0.1773)
OKLCH	oklch(32.1% 0.177 270)
XYZ	xyz(5.4047, 2.7964, 24.6760)
Luminance	0.0280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181A8B #8B8918

analogous

#18538B #181A8B #50188B

triadic

#181A8B #8B181A #1A8B18

tetradic

#181A8B #8B1853 #8B8918 #188B50

square

#181A8B #8B1853 #8B8918 #188B50

split-complementary

#181A8B #8B5018 #538B18

monochromatic

#060623 #0F1057 #181A8B #2124BF #3F42DE

Accessibility & contrast

On white

13.47

#181A8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#181A8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181A8B

13.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181A8B	#FFFFFF	#000000	##FFFFFF
##181A8B	1.00	13.47	1.56	13.47
#FFFFFF	13.47	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348E

Deuteranopia (green-blind)

#002989

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #181a8b;
/* rgb */ color: rgb(24, 26, 139);
/* oklch */ color: oklch(32.1% 0.177 270.0);

Tailwind

colors: {
  custom: {
    50: '#6d59ae',
    500: '#181a8b',
    950: '#000000',
  },
}

SCSS

$custom: #181a8b;
$custom-light: #6d59ae;
$custom-dark: #000000;

JSON

{
  "hex": "#181a8b",
  "rgb": {
    "r": 24,
    "g": 26,
    "b": 139
  },
  "hsl": {
    "h": 238.957,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32097,
    "c": 0.17732,
    "h": 270
  },
  "luminance": 0.02797
}

Semantic roles & 50–950 ramp

primary

#181A8B

secondary

#BEBC40

accent

#EA3AED

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #181A8B

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

Preview Lab → · Contrast checker → · Palette generator →