#183E99#183E99

#183E99 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.8% C 0.155 H 263.6°. Best body text is #FFFFFF at 9.60:1 contrast (WCAG AA passes).

Color values

HEX	#183E99
RGB	rgb(24, 62, 153)
HSL	hsl(222, 73%, 35%)
HSV	hsv(222, 84%, 60%)
CMYK	cmyk(84.3%, 59.5%, 0%, 40%)
CIE-LAB	lab(29.26, 22.65, -53.35)
CIE-LCH	lch(29.26, 57.96, 293.00°)
OKLab	oklab(39.84% -0.0172 -0.1542)
OKLCH	oklch(39.84% 0.155 263.6)
XYZ	xyz(7.8470, 5.9384, 30.8635)
Luminance	0.0594 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E99 #997318

analogous

#187E99 #183E99 #331899

triadic

#183E99 #99183E #3E9918

tetradic

#183E99 #99187E #997318 #189933

square

#183E99 #99187E #997318 #189933

split-complementary

#183E99 #993318 #7E9918

monochromatic

#07132F #102964 #183E99 #2053CE #4976E2

Accessibility & contrast

On white

9.60

#183E99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#183E99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E99

9.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E99	#FFFFFF	#000000	##FFFFFF
##183E99	1.00	9.60	2.19	9.60
#FFFFFF	9.60	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9C

Deuteranopia (green-blind)

#003F97

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #183e99;
/* rgb */ color: rgb(24, 62, 153);
/* oklch */ color: oklch(39.8% 0.155 263.6);

Tailwind

colors: {
  custom: {
    50: '#6d72b8',
    500: '#183e99',
    950: '#000000',
  },
}

SCSS

$custom: #183e99;
$custom-light: #6d72b8;
$custom-dark: #000000;

JSON

{
  "hex": "#183e99",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 153
  },
  "hsl": {
    "h": 222.326,
    "s": 72.881,
    "l": 34.706
  },
  "oklch": {
    "l": 0.39837,
    "c": 0.1552,
    "h": 263.6
  },
  "luminance": 0.05939
}

Semantic roles & 50–950 ramp

primary

#183E99

secondary

#C4A049

accent

#BA38F0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #183E99

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

Preview Lab → · Contrast checker → · Palette generator →