#183D82#183D82

#183D82 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.124 H 261.4°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#183D82
RGB	rgb(24, 61, 130)
HSL	hsl(219, 69%, 30%)
HSV	hsv(219, 82%, 51%)
CMYK	cmyk(81.5%, 53.1%, 0%, 49%)
CIE-LAB	lab(27.14, 13.95, -42.60)
CIE-LCH	lch(27.14, 44.83, 288.14°)
OKLab	oklab(37.66% -0.0185 -0.1227)
OKLCH	oklch(37.66% 0.124 261.4)
XYZ	xyz(6.0732, 5.1427, 21.7873)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D82 #825D18

analogous

#187282 #183D82 #281882

triadic

#183D82 #82183D #3D8218

tetradic

#183D82 #821872 #825D18 #188228

square

#183D82 #821872 #825D18 #188228

split-complementary

#183D82 #822818 #728218

monochromatic

#050D1B #0E254E #183D82 #2255B6 #3A72DB

Accessibility & contrast

On white

10.35

#183D82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#183D82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D82

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D82	#FFFFFF	#000000	##FFFFFF
##183D82	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4584

Deuteranopia (green-blind)

#003C81

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183d82;
/* rgb */ color: rgb(24, 61, 130);
/* oklch */ color: oklch(37.7% 0.124 261.4);

Tailwind

colors: {
  custom: {
    50: '#6771a7',
    500: '#183d82',
    950: '#000000',
  },
}

SCSS

$custom: #183d82;
$custom-light: #6771a7;
$custom-dark: #000000;

JSON

{
  "hex": "#183d82",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 130
  },
  "hsl": {
    "h": 219.057,
    "s": 68.831,
    "l": 30.196
  },
  "oklch": {
    "l": 0.37658,
    "c": 0.12407,
    "h": 261.4
  },
  "luminance": 0.05143
}

Semantic roles & 50–950 ramp

primary

#183D82

secondary

#B68D40

accent

#AE3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183D82

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

Preview Lab → · Contrast checker → · Palette generator →