#181C8B#181C8B

#181C8B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.4% C 0.176 H 269.8°. Best body text is #FFFFFF at 13.31:1 contrast (WCAG AA passes).

Color values

HEX	#181C8B
RGB	rgb(24, 28, 139)
HSL	hsl(238, 71%, 32%)
HSV	hsv(238, 83%, 55%)
CMYK	cmyk(82.7%, 79.9%, 0%, 45.5%)
CIE-LAB	lab(19.59, 39.41, -60.60)
CIE-LCH	lch(19.59, 72.29, 303.04°)
OKLab	oklab(32.36% -0.0006 -0.1755)
OKLCH	oklch(32.36% 0.176 269.8)
XYZ	xyz(5.4506, 2.8881, 24.6913)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C8B #8B8718

analogous

#18568B #181C8B #4E188B

triadic

#181C8B #8B181C #1C8B18

tetradic

#181C8B #8B1856 #8B8718 #188B4E

square

#181C8B #8B1856 #8B8718 #188B4E

split-complementary

#181C8B #8B4E18 #568B18

monochromatic

#060723 #0F1157 #181C8B #2127BF #3F45DE

Accessibility & contrast

On white

13.31

#181C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#181C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C8B

13.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C8B	#FFFFFF	#000000	##FFFFFF
##181C8B	1.00	13.31	1.58	13.31
#FFFFFF	13.31	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358E

Deuteranopia (green-blind)

#002989

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #181c8b;
/* rgb */ color: rgb(24, 28, 139);
/* oklch */ color: oklch(32.4% 0.176 269.8);

Tailwind

colors: {
  custom: {
    50: '#6d5aae',
    500: '#181c8b',
    950: '#000000',
  },
}

SCSS

$custom: #181c8b;
$custom-light: #6d5aae;
$custom-dark: #000000;

JSON

{
  "hex": "#181c8b",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 139
  },
  "hsl": {
    "h": 237.913,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32364,
    "c": 0.17552,
    "h": 269.8
  },
  "luminance": 0.02889
}

Semantic roles & 50–950 ramp

primary

#181C8B

secondary

#BEBA40

accent

#E73AED

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #181C8B

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

Preview Lab → · Contrast checker → · Palette generator →