#183A84#183A84

#183A84 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.2% C 0.131 H 263.0°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#183A84
RGB	rgb(24, 58, 132)
HSL	hsl(221, 69%, 31%)
HSV	hsv(221, 82%, 52%)
CMYK	cmyk(81.8%, 56.1%, 0%, 48.2%)
CIE-LAB	lab(26.41, 16.89, -45.04)
CIE-LCH	lch(26.41, 48.10, 290.55°)
OKLab	oklab(37.15% -0.0159 -0.1299)
OKLCH	oklch(37.15% 0.131 263)
XYZ	xyz(6.0531, 4.8855, 22.4493)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A84 #846218

analogous

#187084 #183A84 #2C1884

triadic

#183A84 #84183A #3A8418

tetradic

#183A84 #841870 #846218 #18842C

square

#183A84 #841870 #846218 #18842C

split-complementary

#183A84 #842C18 #708418

monochromatic

#050C1C #0F2350 #183A84 #2151B8 #3B6EDB

Accessibility & contrast

On white

10.62

#183A84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#183A84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A84

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A84	#FFFFFF	#000000	##FFFFFF
##183A84	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004487

Deuteranopia (green-blind)

#003A83

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183a84;
/* rgb */ color: rgb(24, 58, 132);
/* oklch */ color: oklch(37.2% 0.131 263.0);

Tailwind

colors: {
  custom: {
    50: '#686fa8',
    500: '#183a84',
    950: '#000000',
  },
}

SCSS

$custom: #183a84;
$custom-light: #686fa8;
$custom-dark: #000000;

JSON

{
  "hex": "#183a84",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 132
  },
  "hsl": {
    "h": 221.111,
    "s": 69.231,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37151,
    "c": 0.13088,
    "h": 263
  },
  "luminance": 0.04886
}

Semantic roles & 50–950 ramp

primary

#183A84

secondary

#B89240

accent

#B53CEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183A84

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

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