#183B84#183B84

#183B84 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.4% C 0.130 H 262.6°. Best body text is #FFFFFF at 10.51:1 contrast (WCAG AA passes).

Color values

HEX	#183B84
RGB	rgb(24, 59, 132)
HSL	hsl(221, 69%, 31%)
HSV	hsv(221, 82%, 52%)
CMYK	cmyk(81.8%, 55.3%, 0%, 48.2%)
CIE-LAB	lab(26.70, 16.18, -44.56)
CIE-LCH	lch(26.70, 47.41, 289.96°)
OKLab	oklab(37.37% -0.0167 -0.1285)
OKLCH	oklch(37.37% 0.13 262.6)
XYZ	xyz(6.1040, 4.9873, 22.4663)
Luminance	0.0499 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B84 #846118

analogous

#187184 #183B84 #2B1884

triadic

#183B84 #84183B #3B8418

tetradic

#183B84 #841871 #846118 #18842B

square

#183B84 #841871 #846118 #18842B

split-complementary

#183B84 #842B18 #718418

monochromatic

#050D1C #0F2450 #183B84 #2152B8 #3B6FDB

Accessibility & contrast

On white

10.51

#183B84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#183B84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B84

10.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B84	#FFFFFF	#000000	##FFFFFF
##183B84	1.00	10.51	2.00	10.51
#FFFFFF	10.51	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#014487

Deuteranopia (green-blind)

#003A83

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183b84;
/* rgb */ color: rgb(24, 59, 132);
/* oklch */ color: oklch(37.4% 0.130 262.6);

Tailwind

colors: {
  custom: {
    50: '#6870a8',
    500: '#183b84',
    950: '#000000',
  },
}

SCSS

$custom: #183b84;
$custom-light: #6870a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183b84",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 132
  },
  "hsl": {
    "h": 220.556,
    "s": 69.231,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37373,
    "c": 0.12958,
    "h": 262.6
  },
  "luminance": 0.04988
}

Semantic roles & 50–950 ramp

primary

#183B84

secondary

#B89140

accent

#B33CEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183B84

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

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