#183D90#183D90

#183D90 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.144 H 263.2°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#183D90
RGB	rgb(24, 61, 144)
HSL	hsl(222, 71%, 33%)
HSV	hsv(222, 83%, 56%)
CMYK	cmyk(83.3%, 57.6%, 0%, 43.5%)
CIE-LAB	lab(28.23, 19.70, -49.51)
CIE-LCH	lch(28.23, 53.28, 291.70°)
OKLab	oklab(38.83% -0.0171 -0.143)
OKLCH	oklch(38.83% 0.144 263.2)
XYZ	xyz(7.0777, 5.5444, 27.0773)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D90 #906B18

analogous

#187990 #183D90 #2F1890

triadic

#183D90 #90183D #3D9018

tetradic

#183D90 #901879 #906B18 #18902F

square

#183D90 #901879 #906B18 #18902F

split-complementary

#183D90 #902F18 #799018

monochromatic

#071127 #0F275C #183D90 #2153C4 #4373E0

Accessibility & contrast

On white

9.96

#183D90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#183D90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D90

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D90	#FFFFFF	#000000	##FFFFFF
##183D90	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004893

Deuteranopia (green-blind)

#003D8E

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #183d90;
/* rgb */ color: rgb(24, 61, 144);
/* oklch */ color: oklch(38.8% 0.144 263.2);

Tailwind

colors: {
  custom: {
    50: '#6b71b1',
    500: '#183d90',
    950: '#000000',
  },
}

SCSS

$custom: #183d90;
$custom-light: #6b71b1;
$custom-dark: #000000;

JSON

{
  "hex": "#183d90",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 144
  },
  "hsl": {
    "h": 221.5,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38834,
    "c": 0.144,
    "h": 263.2
  },
  "luminance": 0.05545
}

Semantic roles & 50–950 ramp

primary

#183D90

secondary

#C09A43

accent

#B73AEE

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #183D90

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

Preview Lab → · Contrast checker → · Palette generator →