#183369#183369

#183369 is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.3% C 0.100 H 262.4°. Best body text is #FFFFFF at 12.23:1 contrast (WCAG AA passes).

Color values

HEX	#183369
RGB	rgb(24, 51, 105)
HSL	hsl(220, 63%, 25%)
HSV	hsv(220, 77%, 41%)
CMYK	cmyk(77.1%, 51.4%, 0%, 58.8%)
CIE-LAB	lab(22.24, 10.68, -34.63)
CIE-LCH	lch(22.24, 36.24, 287.14°)
OKLab	oklab(33.32% -0.0133 -0.0994)
OKLCH	oklch(33.32% 0.1 262.4)
XYZ	xyz(4.1094, 3.5813, 13.8366)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183369 #694E18

analogous

#185B69 #183369 #251869

triadic

#183369 #691833 #336918

tetradic

#183369 #69185B #694E18 #186925

square

#183369 #69185B #694E18 #186925

split-complementary

#183369 #692518 #5B6918

monochromatic

#060C19 #0D1B37 #183369 #234B9B #2F63CD

Accessibility & contrast

On white

12.23

#183369 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#183369 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183369

12.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183369	#FFFFFF	#000000	##FFFFFF
##183369	1.00	12.23	1.72	12.23
#FFFFFF	12.23	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15396B

Deuteranopia (green-blind)

#003268

Tritanopia (blue-blind)

#004049

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #183369;
/* rgb */ color: rgb(24, 51, 105);
/* oklch */ color: oklch(33.3% 0.100 262.4);

Tailwind

colors: {
  custom: {
    50: '#616a94',
    500: '#183369',
    950: '#000000',
  },
}

SCSS

$custom: #183369;
$custom-light: #616a94;
$custom-dark: #000000;

JSON

{
  "hex": "#183369",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 105
  },
  "hsl": {
    "h": 220,
    "s": 62.791,
    "l": 25.294
  },
  "oklch": {
    "l": 0.33322,
    "c": 0.10031,
    "h": 262.4
  },
  "luminance": 0.03582
}

Semantic roles & 50–950 ramp

primary

#183369

secondary

#9F7F3E

accent

#AF42E6

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #183369

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

Preview Lab → · Contrast checker → · Palette generator →