#183566#183566

#183566 is a dark, moderate blue. Relative luminance 0.037; OKLCH L 33.6% C 0.093 H 260.2°. Best body text is #FFFFFF at 12.07:1 contrast (WCAG AA passes).

Color values

HEX	#183566
RGB	rgb(24, 53, 102)
HSL	hsl(218, 62%, 25%)
HSV	hsv(218, 76%, 40%)
CMYK	cmyk(76.5%, 48%, 0%, 60%)
CIE-LAB	lab(22.65, 8.00, -32.01)
CIE-LCH	lch(22.65, 33.00, 284.03°)
OKLab	oklab(33.57% -0.0158 -0.0917)
OKLCH	oklch(33.57% 0.093 260.2)
XYZ	xyz(4.0472, 3.6993, 13.0685)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183566 #664918

analogous

#185C66 #183566 #221866

triadic

#183566 #661835 #356618

tetradic

#183566 #66185C #664918 #186622

square

#183566 #66185C #664918 #186622

split-complementary

#183566 #662218 #5C6618

monochromatic

#060D19 #0C1B34 #183566 #244F98 #2F68C9

Accessibility & contrast

On white

12.07

#183566 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#183566 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183566

12.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183566	#FFFFFF	#000000	##FFFFFF
##183566	1.00	12.07	1.74	12.07
#FFFFFF	12.07	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C3A68

Deuteranopia (green-blind)

#0C3365

Tritanopia (blue-blind)

#004048

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #183566;
/* rgb */ color: rgb(24, 53, 102);
/* oklch */ color: oklch(33.6% 0.093 260.2);

Tailwind

colors: {
  custom: {
    50: '#606b92',
    500: '#183566',
    950: '#000000',
  },
}

SCSS

$custom: #183566;
$custom-light: #606b92;
$custom-dark: #000000;

JSON

{
  "hex": "#183566",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 102
  },
  "hsl": {
    "h": 217.692,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.33572,
    "c": 0.09304,
    "h": 260.2
  },
  "luminance": 0.037
}

Semantic roles & 50–950 ramp

primary

#183566

secondary

#9C793E

accent

#A943E5

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#05060D

muted

#7A7A7E

Preview Lab

Preview with #183566

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

Preview Lab → · Contrast checker → · Palette generator →