#183F9A#183F9A

#183F9A is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.1% C 0.155 H 263.4°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#183F9A
RGB	rgb(24, 63, 154)
HSL	hsl(222, 73%, 35%)
HSV	hsv(222, 84%, 60%)
CMYK	cmyk(84.4%, 59.1%, 0%, 39.6%)
CIE-LAB	lab(29.62, 22.36, -53.37)
CIE-LCH	lch(29.62, 57.87, 292.73°)
OKLab	oklab(40.13% -0.0177 -0.1543)
OKLCH	oklch(40.13% 0.155 263.4)
XYZ	xyz(7.9848, 6.0813, 31.3186)
Luminance	0.0608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F9A #9A7318

analogous

#18809A #183F9A #32189A

triadic

#183F9A #9A183F #3F9A18

tetradic

#183F9A #9A1880 #9A7318 #189A32

square

#183F9A #9A1880 #9A7318 #189A32

split-complementary

#183F9A #9A3218 #809A18

monochromatic

#071430 #102965 #183F9A #2055CF #4A78E3

Accessibility & contrast

On white

9.47

#183F9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#183F9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F9A

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F9A	#FFFFFF	#000000	##FFFFFF
##183F9A	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9D

Deuteranopia (green-blind)

#004098

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #183f9a;
/* rgb */ color: rgb(24, 63, 154);
/* oklch */ color: oklch(40.1% 0.155 263.4);

Tailwind

colors: {
  custom: {
    50: '#6e73b9',
    500: '#183f9a',
    950: '#000000',
  },
}

SCSS

$custom: #183f9a;
$custom-light: #6e73b9;
$custom-dark: #000000;

JSON

{
  "hex": "#183f9a",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 154
  },
  "hsl": {
    "h": 222,
    "s": 73.034,
    "l": 34.902
  },
  "oklch": {
    "l": 0.40133,
    "c": 0.15532,
    "h": 263.4
  },
  "luminance": 0.06082
}

Semantic roles & 50–950 ramp

primary

#183F9A

secondary

#C49F4A

accent

#B938F0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #183F9A

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

Preview Lab → · Contrast checker → · Palette generator →