#183A82#183A82

#183A82 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.0% C 0.128 H 262.8°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#183A82
RGB	rgb(24, 58, 130)
HSL	hsl(221, 69%, 30%)
HSV	hsv(221, 82%, 51%)
CMYK	cmyk(81.5%, 55.4%, 0%, 49%)
CIE-LAB	lab(26.25, 16.06, -44.04)
CIE-LCH	lch(26.25, 46.88, 290.04°)
OKLab	oklab(36.98% -0.0161 -0.127)
OKLCH	oklch(36.98% 0.128 262.8)
XYZ	xyz(5.9176, 4.8313, 21.7354)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A82 #826018

analogous

#186F82 #183A82 #2B1882

triadic

#183A82 #82183A #3A8218

tetradic

#183A82 #82186F #826018 #18822B

square

#183A82 #82186F #826018 #18822B

split-complementary

#183A82 #822B18 #6F8218

monochromatic

#050C1B #0E234E #183A82 #2251B6 #3A6DDB

Accessibility & contrast

On white

10.68

#183A82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#183A82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A82

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A82	#FFFFFF	#000000	##FFFFFF
##183A82	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#014385

Deuteranopia (green-blind)

#003981

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183a82;
/* rgb */ color: rgb(24, 58, 130);
/* oklch */ color: oklch(37.0% 0.128 262.8);

Tailwind

colors: {
  custom: {
    50: '#676fa7',
    500: '#183a82',
    950: '#000000',
  },
}

SCSS

$custom: #183a82;
$custom-light: #676fa7;
$custom-dark: #000000;

JSON

{
  "hex": "#183a82",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 130
  },
  "hsl": {
    "h": 220.755,
    "s": 68.831,
    "l": 30.196
  },
  "oklch": {
    "l": 0.36982,
    "c": 0.12801,
    "h": 262.8
  },
  "luminance": 0.04832
}

Semantic roles & 50–950 ramp

primary

#183A82

secondary

#B69040

accent

#B33CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183A82

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

Preview Lab → · Contrast checker → · Palette generator →