#183579#183579

#183579 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.1% C 0.122 H 263.8°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#183579
RGB	rgb(24, 53, 121)
HSL	hsl(222, 67%, 28%)
HSV	hsv(222, 80%, 47%)
CMYK	cmyk(80.2%, 56.2%, 0%, 52.5%)
CIE-LAB	lab(24.07, 15.89, -41.92)
CIE-LCH	lch(24.07, 44.83, 290.76°)
OKLab	oklab(35.1% -0.0131 -0.1208)
OKLCH	oklch(35.1% 0.122 263.8)
XYZ	xyz(5.0998, 4.1203, 18.6120)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183579 #795C18

analogous

#186579 #183579 #2B1879

triadic

#183579 #791835 #357918

tetradic

#183579 #791865 #795C18 #18792B

square

#183579 #791865 #795C18 #18792B

split-complementary

#183579 #792B18 #657918

monochromatic

#050B1A #0E1F46 #183579 #224BAC #3565D7

Accessibility & contrast

On white

11.51

#183579 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#183579 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183579

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183579	#FFFFFF	#000000	##FFFFFF
##183579	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7B

Deuteranopia (green-blind)

#003578

Tritanopia (blue-blind)

#004651

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183579;
/* rgb */ color: rgb(24, 53, 121);
/* oklch */ color: oklch(35.1% 0.122 263.8);

Tailwind

colors: {
  custom: {
    50: '#656ba0',
    500: '#183579',
    950: '#000000',
  },
}

SCSS

$custom: #183579;
$custom-light: #656ba0;
$custom-dark: #000000;

JSON

{
  "hex": "#183579",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 121
  },
  "hsl": {
    "h": 222.062,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.35103,
    "c": 0.12154,
    "h": 263.8
  },
  "luminance": 0.04121
}

Semantic roles & 50–950 ramp

primary

#183579

secondary

#AE8D3F

accent

#B63EEA

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060F

muted

#7A7A7E

Preview Lab

Preview with #183579

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

Preview Lab → · Contrast checker → · Palette generator →