#183F83#183F83

#183F83 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.2% C 0.123 H 260.7°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#183F83
RGB	rgb(24, 63, 131)
HSL	hsl(218, 69%, 30%)
HSV	hsv(218, 82%, 51%)
CMYK	cmyk(81.7%, 51.9%, 0%, 48.6%)
CIE-LAB	lab(27.81, 12.97, -42.14)
CIE-LCH	lch(27.81, 44.09, 287.11°)
OKLab	oklab(38.2% -0.0199 -0.1213)
OKLCH	oklch(38.2% 0.123 260.7)
XYZ	xyz(6.2494, 5.3872, 22.1788)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F83 #835C18

analogous

#187483 #183F83 #271883

triadic

#183F83 #83183F #3F8318

tetradic

#183F83 #831874 #835C18 #188327

square

#183F83 #831874 #835C18 #188327

split-complementary

#183F83 #832718 #748318

monochromatic

#050D1C #0F264F #183F83 #2158B7 #3A75DB

Accessibility & contrast

On white

10.11

#183F83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#183F83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F83

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F83	#FFFFFF	#000000	##FFFFFF
##183F83	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144785

Deuteranopia (green-blind)

#003D82

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183f83;
/* rgb */ color: rgb(24, 63, 131);
/* oklch */ color: oklch(38.2% 0.123 260.7);

Tailwind

colors: {
  custom: {
    50: '#6773a8',
    500: '#183f83',
    950: '#000000',
  },
}

SCSS

$custom: #183f83;
$custom-light: #6773a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183f83",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 131
  },
  "hsl": {
    "h": 218.131,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.38196,
    "c": 0.12291,
    "h": 260.7
  },
  "luminance": 0.05388
}

Semantic roles & 50–950 ramp

primary

#183F83

secondary

#B78C40

accent

#AC3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183F83

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

Preview Lab → · Contrast checker → · Palette generator →