#183588#183588

#183588 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.4% C 0.143 H 265.1°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#183588
RGB	rgb(24, 53, 136)
HSL	hsl(224, 70%, 31%)
HSV	hsv(224, 82%, 53%)
CMYK	cmyk(82.4%, 61%, 0%, 46.7%)
CIE-LAB	lab(25.31, 22.03, -49.31)
CIE-LCH	lch(25.31, 54.01, 294.07°)
OKLab	oklab(36.43% -0.0122 -0.1426)
OKLCH	oklch(36.43% 0.143 265.1)
XYZ	xyz(6.0922, 4.5173, 23.8386)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183588 #886B18

analogous

#186D88 #183588 #331888

triadic

#183588 #881835 #358818

tetradic

#183588 #88186D #886B18 #188833

square

#183588 #88186D #886B18 #188833

split-complementary

#183588 #883318 #6D8818

monochromatic

#060C20 #0F2154 #183588 #2149BC #3E67DD

Accessibility & contrast

On white

11.03

#183588 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#183588 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183588

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183588	#FFFFFF	#000000	##FFFFFF
##183588	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418B

Deuteranopia (green-blind)

#003786

Tritanopia (blue-blind)

#004A59

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183588;
/* rgb */ color: rgb(24, 53, 136);
/* oklch */ color: oklch(36.4% 0.143 265.1);

Tailwind

colors: {
  custom: {
    50: '#696bab',
    500: '#183588',
    950: '#000000',
  },
}

SCSS

$custom: #183588;
$custom-light: #696bab;
$custom-dark: #000000;

JSON

{
  "hex": "#183588",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 136
  },
  "hsl": {
    "h": 224.464,
    "s": 70,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36432,
    "c": 0.14308,
    "h": 265.1
  },
  "luminance": 0.04518
}

Semantic roles & 50–950 ramp

primary

#183588

secondary

#BC9C40

accent

#BF3BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #183588

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

Preview Lab → · Contrast checker → · Palette generator →