#183E8D#183E8D

#183E8D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.8% C 0.139 H 262.5°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#183E8D
RGB	rgb(24, 62, 141)
HSL	hsl(221, 71%, 32%)
HSV	hsv(221, 83%, 55%)
CMYK	cmyk(83%, 56%, 0%, 44.7%)
CIE-LAB	lab(28.28, 17.78, -47.58)
CIE-LCH	lch(28.28, 50.80, 290.49°)
OKLab	oklab(38.79% -0.018 -0.1373)
OKLCH	oklch(38.79% 0.139 262.5)
XYZ	xyz(6.9053, 5.5617, 25.9037)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E8D #8D6718

analogous

#18788D #183E8D #2D188D

triadic

#183E8D #8D183E #3E8D18

tetradic

#183E8D #8D1878 #8D6718 #188D2D

square

#183E8D #8D1878 #8D6718 #188D2D

split-complementary

#183E8D #8D2D18 #788D18

monochromatic

#061024 #0F2759 #183E8D #2155C1 #4174DF

Accessibility & contrast

On white

9.94

#183E8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#183E8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E8D

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E8D	#FFFFFF	#000000	##FFFFFF
##183E8D	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004890

Deuteranopia (green-blind)

#003E8B

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #183e8d;
/* rgb */ color: rgb(24, 62, 141);
/* oklch */ color: oklch(38.8% 0.139 262.5);

Tailwind

colors: {
  custom: {
    50: '#6a72af',
    500: '#183e8d',
    950: '#000000',
  },
}

SCSS

$custom: #183e8d;
$custom-light: #6a72af;
$custom-dark: #000000;

JSON

{
  "hex": "#183e8d",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 141
  },
  "hsl": {
    "h": 220.513,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38793,
    "c": 0.1385,
    "h": 262.5
  },
  "luminance": 0.05563
}

Semantic roles & 50–950 ramp

primary

#183E8D

secondary

#BF9642

accent

#B33AEE

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #183E8D

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

Preview Lab → · Contrast checker → · Palette generator →