#183578#183578

#183578 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.0% C 0.120 H 263.7°. Best body text is #FFFFFF at 11.54:1 contrast (WCAG AA passes).

Color values

HEX	#183578
RGB	rgb(24, 53, 120)
HSL	hsl(222, 67%, 28%)
HSV	hsv(222, 80%, 47%)
CMYK	cmyk(80%, 55.8%, 0%, 52.9%)
CIE-LAB	lab(23.99, 15.48, -41.41)
CIE-LCH	lch(23.99, 44.21, 290.49°)
OKLab	oklab(35.02% -0.0132 -0.1193)
OKLCH	oklch(35.02% 0.12 263.7)
XYZ	xyz(5.0387, 4.0959, 18.2907)
Luminance	0.0410 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183578 #785B18

analogous

#186578 #183578 #2B1878

triadic

#183578 #781835 #357818

tetradic

#183578 #781865 #785B18 #18782B

square

#183578 #781865 #785B18 #18782B

split-complementary

#183578 #782B18 #657818

monochromatic

#050B1A #0E1E45 #183578 #224CAB #3465D6

Accessibility & contrast

On white

11.54

#183578 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#183578 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183578

11.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183578	#FFFFFF	#000000	##FFFFFF
##183578	1.00	11.54	1.82	11.54
#FFFFFF	11.54	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#013E7A

Deuteranopia (green-blind)

#003577

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183578;
/* rgb */ color: rgb(24, 53, 120);
/* oklch */ color: oklch(35.0% 0.120 263.7);

Tailwind

colors: {
  custom: {
    50: '#656b9f',
    500: '#183578',
    950: '#000000',
  },
}

SCSS

$custom: #183578;
$custom-light: #656b9f;
$custom-dark: #000000;

JSON

{
  "hex": "#183578",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 120
  },
  "hsl": {
    "h": 221.875,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35018,
    "c": 0.12007,
    "h": 263.7
  },
  "luminance": 0.04096
}

Semantic roles & 50–950 ramp

primary

#183578

secondary

#AD8C3F

accent

#B63EEA

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060F

muted

#7A7A7E

Preview Lab

Preview with #183578

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

Preview Lab → · Contrast checker → · Palette generator →