#183C8A#183C8A

#183C8A is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.1% C 0.137 H 262.9°. Best body text is #FFFFFF at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#183C8A
RGB	rgb(24, 60, 138)
HSL	hsl(221, 70%, 32%)
HSV	hsv(221, 83%, 54%)
CMYK	cmyk(82.6%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(27.46, 17.95, -47.05)
CIE-LCH	lch(27.46, 50.36, 290.88°)
OKLab	oklab(38.1% -0.0168 -0.1358)
OKLCH	oklch(38.1% 0.137 262.9)
XYZ	xyz(6.5783, 5.2601, 24.7084)
Luminance	0.0526 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C8A #8A6618

analogous

#18758A #183C8A #2D188A

triadic

#183C8A #8A183C #3C8A18

tetradic

#183C8A #8A1875 #8A6618 #188A2D

square

#183C8A #8A1875 #8A6618 #188A2D

split-complementary

#183C8A #8A2D18 #758A18

monochromatic

#060F22 #0F2556 #183C8A #2153BE #3F71DE

Accessibility & contrast

On white

10.23

#183C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#183C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C8A

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C8A	#FFFFFF	#000000	##FFFFFF
##183C8A	1.00	10.23	2.05	10.23
#FFFFFF	10.23	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468D

Deuteranopia (green-blind)

#003C88

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183c8a;
/* rgb */ color: rgb(24, 60, 138);
/* oklch */ color: oklch(38.1% 0.137 262.9);

Tailwind

colors: {
  custom: {
    50: '#6971ad',
    500: '#183c8a',
    950: '#000000',
  },
}

SCSS

$custom: #183c8a;
$custom-light: #6971ad;
$custom-dark: #000000;

JSON

{
  "hex": "#183c8a",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 221.053,
    "s": 70.37,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38101,
    "c": 0.13684,
    "h": 262.9
  },
  "luminance": 0.05261
}

Semantic roles & 50–950 ramp

primary

#183C8A

secondary

#BD9640

accent

#B53BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183C8A

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

Preview Lab → · Contrast checker → · Palette generator →