#183F84#183F84

#183F84 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.3% C 0.124 H 260.8°. Best body text is #FFFFFF at 10.08:1 contrast (WCAG AA passes).

Color values

HEX	#183F84
RGB	rgb(24, 63, 132)
HSL	hsl(218, 69%, 31%)
HSV	hsv(218, 82%, 52%)
CMYK	cmyk(81.8%, 52.3%, 0%, 48.2%)
CIE-LAB	lab(27.88, 13.38, -42.64)
CIE-LCH	lch(27.88, 44.70, 287.42°)
OKLab	oklab(38.28% -0.0198 -0.1228)
OKLCH	oklch(38.28% 0.124 260.8)
XYZ	xyz(6.3175, 5.4144, 22.5374)
Luminance	0.0541 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F84 #845D18

analogous

#187584 #183F84 #271884

triadic

#183F84 #84183F #3F8418

tetradic

#183F84 #841875 #845D18 #188427

square

#183F84 #841875 #845D18 #188427

split-complementary

#183F84 #842718 #758418

monochromatic

#050E1C #0F2650 #183F84 #2158B8 #3B75DB

Accessibility & contrast

On white

10.08

#183F84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#183F84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F84

10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F84	#FFFFFF	#000000	##FFFFFF
##183F84	1.00	10.08	2.08	10.08
#FFFFFF	10.08	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134786

Deuteranopia (green-blind)

#003D83

Tritanopia (blue-blind)

#00505B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183f84;
/* rgb */ color: rgb(24, 63, 132);
/* oklch */ color: oklch(38.3% 0.124 260.8);

Tailwind

colors: {
  custom: {
    50: '#6873a8',
    500: '#183f84',
    950: '#000000',
  },
}

SCSS

$custom: #183f84;
$custom-light: #6873a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183f84",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 132
  },
  "hsl": {
    "h": 218.333,
    "s": 69.231,
    "l": 30.588
  },
  "oklch": {
    "l": 0.38275,
    "c": 0.12435,
    "h": 260.8
  },
  "luminance": 0.05415
}

Semantic roles & 50–950 ramp

primary

#183F84

secondary

#B88D40

accent

#AC3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #183F84

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

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