#183C90#183C90

#183C90 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.145 H 263.5°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#183C90
RGB	rgb(24, 60, 144)
HSL	hsl(222, 71%, 33%)
HSV	hsv(222, 83%, 56%)
CMYK	cmyk(83.3%, 58.3%, 0%, 43.5%)
CIE-LAB	lab(27.95, 20.39, -49.97)
CIE-LCH	lch(27.95, 53.97, 292.20°)
OKLab	oklab(38.62% -0.0164 -0.1444)
OKLCH	oklch(38.62% 0.145 263.5)
XYZ	xyz(7.0248, 5.4387, 27.0597)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C90 #906C18

analogous

#187890 #183C90 #301890

triadic

#183C90 #90183C #3C9018

tetradic

#183C90 #901878 #906C18 #189030

square

#183C90 #901878 #906C18 #189030

split-complementary

#183C90 #903018 #789018

monochromatic

#071027 #0F265C #183C90 #2152C4 #4372E0

Accessibility & contrast

On white

10.06

#183C90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#183C90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C90

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C90	#FFFFFF	#000000	##FFFFFF
##183C90	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004893

Deuteranopia (green-blind)

#003D8E

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183c90;
/* rgb */ color: rgb(24, 60, 144);
/* oklch */ color: oklch(38.6% 0.145 263.5);

Tailwind

colors: {
  custom: {
    50: '#6b71b1',
    500: '#183c90',
    950: '#000000',
  },
}

SCSS

$custom: #183c90;
$custom-light: #6b71b1;
$custom-dark: #000000;

JSON

{
  "hex": "#183c90",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 144
  },
  "hsl": {
    "h": 222,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38621,
    "c": 0.14529,
    "h": 263.5
  },
  "luminance": 0.0544
}

Semantic roles & 50–950 ramp

primary

#183C90

secondary

#C09B43

accent

#B83AEE

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #183C90

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

Preview Lab → · Contrast checker → · Palette generator →