#183573#183573

#183573 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.6% C 0.113 H 263.0°. Best body text is #FFFFFF at 11.70:1 contrast (WCAG AA passes).

Color values

HEX	#183573
RGB	rgb(24, 53, 115)
HSL	hsl(221, 65%, 27%)
HSV	hsv(221, 79%, 45%)
CMYK	cmyk(79.1%, 53.9%, 0%, 54.9%)
CIE-LAB	lab(23.60, 13.40, -38.86)
CIE-LCH	lch(23.60, 41.11, 289.03°)
OKLab	oklab(34.6% -0.0137 -0.1118)
OKLCH	oklch(34.6% 0.113 263)
XYZ	xyz(4.7432, 3.9777, 16.7341)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183573 #735618

analogous

#186373 #183573 #281873

triadic

#183573 #731835 #357318

tetradic

#183573 #731863 #735618 #187328

square

#183573 #731863 #735618 #187328

split-complementary

#183573 #732818 #637318

monochromatic

#050C19 #0D1E40 #183573 #234CA6 #3165D4

Accessibility & contrast

On white

11.70

#183573 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#183573 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183573

11.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183573	#FFFFFF	#000000	##FFFFFF
##183573	1.00	11.70	1.80	11.70
#FFFFFF	11.70	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C3D75

Deuteranopia (green-blind)

#003472

Tritanopia (blue-blind)

#00444E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183573;
/* rgb */ color: rgb(24, 53, 115);
/* oklch */ color: oklch(34.6% 0.113 263.0);

Tailwind

colors: {
  custom: {
    50: '#646b9c',
    500: '#183573',
    950: '#000000',
  },
}

SCSS

$custom: #183573;
$custom-light: #646b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#183573",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 115
  },
  "hsl": {
    "h": 220.879,
    "s": 65.468,
    "l": 27.255
  },
  "oklch": {
    "l": 0.34599,
    "c": 0.11267,
    "h": 263
  },
  "luminance": 0.03978
}

Semantic roles & 50–950 ramp

primary

#183573

secondary

#A8873F

accent

#B33FE8

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #183573

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

Preview Lab → · Contrast checker → · Palette generator →