#183B8D#183B8D

#183B8D is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.1% C 0.142 H 263.6°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#183B8D
RGB	rgb(24, 59, 141)
HSL	hsl(222, 71%, 32%)
HSV	hsv(222, 83%, 55%)
CMYK	cmyk(83%, 58.2%, 0%, 44.7%)
CIE-LAB	lab(27.42, 19.87, -48.98)
CIE-LCH	lch(27.42, 52.86, 292.08°)
OKLab	oklab(38.15% -0.0159 -0.1415)
OKLCH	oklch(38.15% 0.142 263.6)
XYZ	xyz(6.7467, 5.2444, 25.8508)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B8D #8D6A18

analogous

#18768D #183B8D #2F188D

triadic

#183B8D #8D183B #3B8D18

tetradic

#183B8D #8D1876 #8D6A18 #188D2F

square

#183B8D #8D1876 #8D6A18 #188D2F

split-complementary

#183B8D #8D2F18 #768D18

monochromatic

#060F24 #0F2559 #183B8D #2151C1 #4170DF

Accessibility & contrast

On white

10.25

#183B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#183B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B8D

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B8D	#FFFFFF	#000000	##FFFFFF
##183B8D	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004690

Deuteranopia (green-blind)

#003C8B

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183b8d;
/* rgb */ color: rgb(24, 59, 141);
/* oklch */ color: oklch(38.1% 0.142 263.6);

Tailwind

colors: {
  custom: {
    50: '#6a70af',
    500: '#183b8d',
    950: '#000000',
  },
}

SCSS

$custom: #183b8d;
$custom-light: #6a70af;
$custom-dark: #000000;

JSON

{
  "hex": "#183b8d",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 141
  },
  "hsl": {
    "h": 222.051,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38145,
    "c": 0.14237,
    "h": 263.6
  },
  "luminance": 0.05245
}

Semantic roles & 50–950 ramp

primary

#183B8D

secondary

#BF9A42

accent

#B83AEE

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #183B8D

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

Preview Lab → · Contrast checker → · Palette generator →