#183D9F#183D9F

#183D9F is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.2% C 0.165 H 264.3°. Best body text is #FFFFFF at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#183D9F
RGB	rgb(24, 61, 159)
HSL	hsl(224, 74%, 36%)
HSV	hsv(224, 85%, 62%)
CMYK	cmyk(84.9%, 61.6%, 0%, 37.6%)
CIE-LAB	lab(29.50, 25.73, -56.60)
CIE-LCH	lch(29.50, 62.17, 294.44°)
OKLab	oklab(40.18% -0.0164 -0.1638)
OKLCH	oklch(40.18% 0.165 264.3)
XYZ	xyz(8.3012, 6.0339, 33.5213)
Luminance	0.0604 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D9F #9F7A18

analogous

#18809F #183D9F #37189F

triadic

#183D9F #9F183D #3D9F18

tetradic

#183D9F #9F1880 #9F7A18 #189F37

square

#183D9F #9F1880 #9F7A18 #189F37

split-complementary

#183D9F #9F3718 #809F18

monochromatic

#081435 #10296A #183D9F #2051D4 #4D77E4

Accessibility & contrast

On white

9.52

#183D9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#183D9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D9F

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D9F	#FFFFFF	#000000	##FFFFFF
##183D9F	1.00	9.52	2.21	9.52
#FFFFFF	9.52	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA2

Deuteranopia (green-blind)

#003F9D

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #183d9f;
/* rgb */ color: rgb(24, 61, 159);
/* oklch */ color: oklch(40.2% 0.165 264.3);

Tailwind

colors: {
  custom: {
    50: '#6f72bc',
    500: '#183d9f',
    950: '#000000',
  },
}

SCSS

$custom: #183d9f;
$custom-light: #6f72bc;
$custom-dark: #000000;

JSON

{
  "hex": "#183d9f",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 159
  },
  "hsl": {
    "h": 223.556,
    "s": 73.77,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40177,
    "c": 0.16462,
    "h": 264.3
  },
  "luminance": 0.06035
}

Semantic roles & 50–950 ramp

primary

#183D9F

secondary

#C6A54D

accent

#BE37F0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183D9F

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

Preview Lab → · Contrast checker → · Palette generator →