#183F82#183F82

#183F82 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.1% C 0.121 H 260.5°. Best body text is #FFFFFF at 10.13:1 contrast (WCAG AA passes).

Color values

HEX	#183F82
RGB	rgb(24, 63, 130)
HSL	hsl(218, 69%, 30%)
HSV	hsv(218, 82%, 51%)
CMYK	cmyk(81.5%, 51.5%, 0%, 49%)
CIE-LAB	lab(27.74, 12.56, -41.64)
CIE-LCH	lch(27.74, 43.49, 286.78°)
OKLab	oklab(38.12% -0.0201 -0.1198)
OKLCH	oklch(38.12% 0.121 260.5)
XYZ	xyz(6.1820, 5.3602, 21.8236)
Luminance	0.0536 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F82 #825B18

analogous

#187482 #183F82 #261882

triadic

#183F82 #82183F #3F8218

tetradic

#183F82 #821874 #825B18 #188226

square

#183F82 #821874 #825B18 #188226

split-complementary

#183F82 #822618 #748218

monochromatic

#050D1B #0E264E #183F82 #2258B6 #3A75DB

Accessibility & contrast

On white

10.13

#183F82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#183F82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F82

10.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F82	#FFFFFF	#000000	##FFFFFF
##183F82	1.00	10.13	2.07	10.13
#FFFFFF	10.13	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164784

Deuteranopia (green-blind)

#003D81

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183f82;
/* rgb */ color: rgb(24, 63, 130);
/* oklch */ color: oklch(38.1% 0.121 260.5);

Tailwind

colors: {
  custom: {
    50: '#6773a7',
    500: '#183f82',
    950: '#000000',
  },
}

SCSS

$custom: #183f82;
$custom-light: #6773a7;
$custom-dark: #000000;

JSON

{
  "hex": "#183f82",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 130
  },
  "hsl": {
    "h": 217.925,
    "s": 68.831,
    "l": 30.196
  },
  "oklch": {
    "l": 0.38116,
    "c": 0.12147,
    "h": 260.5
  },
  "luminance": 0.05361
}

Semantic roles & 50–950 ramp

primary

#183F82

secondary

#B68B40

accent

#AB3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183F82

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

Preview Lab → · Contrast checker → · Palette generator →