#183E9F#183E9F

#183E9F is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.163 H 264.1°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#183E9F
RGB	rgb(24, 62, 159)
HSL	hsl(223, 74%, 36%)
HSV	hsv(223, 85%, 62%)
CMYK	cmyk(84.9%, 61%, 0%, 37.6%)
CIE-LAB	lab(29.77, 25.05, -56.16)
CIE-LCH	lch(29.77, 61.49, 294.04°)
OKLab	oklab(40.38% -0.0169 -0.1625)
OKLCH	oklch(40.38% 0.163 264.1)
XYZ	xyz(8.3551, 6.1416, 33.5393)
Luminance	0.0614 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E9F #9F7918

analogous

#18819F #183E9F #35189F

triadic

#183E9F #9F183E #3E9F18

tetradic

#183E9F #9F1881 #9F7918 #189F35

square

#183E9F #9F1881 #9F7918 #189F35

split-complementary

#183E9F #9F3518 #819F18

monochromatic

#081535 #10296A #183E9F #2053D4 #4D78E4

Accessibility & contrast

On white

9.42

#183E9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#183E9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E9F

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E9F	#FFFFFF	#000000	##FFFFFF
##183E9F	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00409D

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #183e9f;
/* rgb */ color: rgb(24, 62, 159);
/* oklch */ color: oklch(40.4% 0.163 264.1);

Tailwind

colors: {
  custom: {
    50: '#6f72bc',
    500: '#183e9f',
    950: '#000000',
  },
}

SCSS

$custom: #183e9f;
$custom-light: #6f72bc;
$custom-dark: #000000;

JSON

{
  "hex": "#183e9f",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 159
  },
  "hsl": {
    "h": 223.111,
    "s": 73.77,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40378,
    "c": 0.16338,
    "h": 264.1
  },
  "luminance": 0.06143
}

Semantic roles & 50–950 ramp

primary

#183E9F

secondary

#C6A44D

accent

#BC37F0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #183E9F

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

Preview Lab → · Contrast checker → · Palette generator →