#183E90#183E90

#183E90 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.0% C 0.143 H 262.9°. Best body text is #FFFFFF at 9.86:1 contrast (WCAG AA passes).

Color values

HEX	#183E90
RGB	rgb(24, 62, 144)
HSL	hsl(221, 71%, 33%)
HSV	hsv(221, 83%, 56%)
CMYK	cmyk(83.3%, 56.9%, 0%, 43.5%)
CIE-LAB	lab(28.52, 19.00, -49.04)
CIE-LCH	lch(28.52, 52.60, 291.18°)
OKLab	oklab(39.05% -0.0177 -0.1416)
OKLCH	oklch(39.05% 0.143 262.9)
XYZ	xyz(7.1315, 5.6522, 27.0953)
Luminance	0.0565 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E90 #906A18

analogous

#187A90 #183E90 #2E1890

triadic

#183E90 #90183E #3E9018

tetradic

#183E90 #90187A #906A18 #18902E

square

#183E90 #90187A #906A18 #18902E

split-complementary

#183E90 #902E18 #7A9018

monochromatic

#071127 #0F275C #183E90 #2155C4 #4374E0

Accessibility & contrast

On white

9.86

#183E90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#183E90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E90

9.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E90	#FFFFFF	#000000	##FFFFFF
##183E90	1.00	9.86	2.13	9.86
#FFFFFF	9.86	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004993

Deuteranopia (green-blind)

#003E8E

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #183e90;
/* rgb */ color: rgb(24, 62, 144);
/* oklch */ color: oklch(39.0% 0.143 262.9);

Tailwind

colors: {
  custom: {
    50: '#6b72b1',
    500: '#183e90',
    950: '#000000',
  },
}

SCSS

$custom: #183e90;
$custom-light: #6b72b1;
$custom-dark: #000000;

JSON

{
  "hex": "#183e90",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 144
  },
  "hsl": {
    "h": 221,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.39049,
    "c": 0.14272,
    "h": 262.9
  },
  "luminance": 0.05653
}

Semantic roles & 50–950 ramp

primary

#183E90

secondary

#C09943

accent

#B53AEE

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #183E90

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

Preview Lab → · Contrast checker → · Palette generator →