#183378#183378

#183378 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.6% C 0.123 H 264.6°. Best body text is #FFFFFF at 11.77:1 contrast (WCAG AA passes).

Color values

HEX	#183378
RGB	rgb(24, 51, 120)
HSL	hsl(223, 67%, 28%)
HSV	hsv(223, 80%, 47%)
CMYK	cmyk(80%, 57.5%, 0%, 52.9%)
CIE-LAB	lab(23.40, 16.90, -42.37)
CIE-LCH	lch(23.40, 45.62, 291.75°)
OKLab	oklab(34.57% -0.0116 -0.1222)
OKLCH	oklch(34.57% 0.123 264.6)
XYZ	xyz(4.9495, 3.9173, 18.2609)
Luminance	0.0392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183378 #785D18

analogous

#186378 #183378 #2D1878

triadic

#183378 #781833 #337818

tetradic

#183378 #781863 #785D18 #18782D

square

#183378 #781863 #785D18 #18782D

split-complementary

#183378 #782D18 #637818

monochromatic

#050B1A #0E1D45 #183378 #2249AB #3462D6

Accessibility & contrast

On white

11.77

#183378 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#183378 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183378

11.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183378	#FFFFFF	#000000	##FFFFFF
##183378	1.00	11.77	1.78	11.77
#FFFFFF	11.77	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C7A

Deuteranopia (green-blind)

#003477

Tritanopia (blue-blind)

#004450

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183378;
/* rgb */ color: rgb(24, 51, 120);
/* oklch */ color: oklch(34.6% 0.123 264.6);

Tailwind

colors: {
  custom: {
    50: '#656aa0',
    500: '#183378',
    950: '#000000',
  },
}

SCSS

$custom: #183378;
$custom-light: #656aa0;
$custom-dark: #000000;

JSON

{
  "hex": "#183378",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 120
  },
  "hsl": {
    "h": 223.125,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.34572,
    "c": 0.12275,
    "h": 264.6
  },
  "luminance": 0.03918
}

Semantic roles & 50–950 ramp

primary

#183378

secondary

#AD8E3F

accent

#B93EEA

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060F

muted

#7A7A7E

Preview Lab

Preview with #183378

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

Preview Lab → · Contrast checker → · Palette generator →