#183A90#183A90

#183A90 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.148 H 264.1°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX	#183A90
RGB	rgb(24, 58, 144)
HSL	hsl(223, 71%, 33%)
HSV	hsv(223, 83%, 56%)
CMYK	cmyk(83.3%, 59.7%, 0%, 43.5%)
CIE-LAB	lab(27.39, 21.78, -50.88)
CIE-LCH	lch(27.39, 55.35, 293.17°)
OKLab	oklab(38.2% -0.0151 -0.1471)
OKLCH	oklch(38.2% 0.148 264.1)
XYZ	xyz(6.9220, 5.2331, 27.0254)
Luminance	0.0523 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A90 #906E18

analogous

#187690 #183A90 #321890

triadic

#183A90 #90183A #3A9018

tetradic

#183A90 #901876 #906E18 #189032

square

#183A90 #901876 #906E18 #189032

split-complementary

#183A90 #903218 #769018

monochromatic

#071027 #0F255C #183A90 #214FC4 #436FE0

Accessibility & contrast

On white

10.26

#183A90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#183A90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A90

10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A90	#FFFFFF	#000000	##FFFFFF
##183A90	1.00	10.26	2.05	10.26
#FFFFFF	10.26	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004693

Deuteranopia (green-blind)

#003B8E

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183a90;
/* rgb */ color: rgb(24, 58, 144);
/* oklch */ color: oklch(38.2% 0.148 264.1);

Tailwind

colors: {
  custom: {
    50: '#6b6fb1',
    500: '#183a90',
    950: '#000000',
  },
}

SCSS

$custom: #183a90;
$custom-light: #6b6fb1;
$custom-dark: #000000;

JSON

{
  "hex": "#183a90",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 144
  },
  "hsl": {
    "h": 223,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.382,
    "c": 0.14785,
    "h": 264.1
  },
  "luminance": 0.05234
}

Semantic roles & 50–950 ramp

primary

#183A90

secondary

#C09D43

accent

#BB3AEE

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #183A90

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

Preview Lab → · Contrast checker → · Palette generator →