#183D85#183D85

#183D85 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.9% C 0.128 H 261.9°. Best body text is #FFFFFF at 10.27:1 contrast (WCAG AA passes).

Color values

HEX	#183D85
RGB	rgb(24, 61, 133)
HSL	hsl(220, 69%, 31%)
HSV	hsv(220, 82%, 52%)
CMYK	cmyk(82%, 54.1%, 0%, 47.8%)
CIE-LAB	lab(27.36, 15.19, -44.11)
CIE-LCH	lch(27.36, 46.65, 289.01°)
OKLab	oklab(37.9% -0.0181 -0.1271)
OKLCH	oklch(37.9% 0.128 261.9)
XYZ	xyz(6.2775, 5.2244, 22.8633)
Luminance	0.0522 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D85 #856018

analogous

#187385 #183D85 #291885

triadic

#183D85 #85183D #3D8518

tetradic

#183D85 #851873 #856018 #188529

square

#183D85 #851873 #856018 #188529

split-complementary

#183D85 #852918 #738518

monochromatic

#050D1D #0F2551 #183D85 #2155B9 #3C72DC

Accessibility & contrast

On white

10.27

#183D85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#183D85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D85

10.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D85	#FFFFFF	#000000	##FFFFFF
##183D85	1.00	10.27	2.05	10.27
#FFFFFF	10.27	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#084688

Deuteranopia (green-blind)

#003C84

Tritanopia (blue-blind)

#004F5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183d85;
/* rgb */ color: rgb(24, 61, 133);
/* oklch */ color: oklch(37.9% 0.128 261.9);

Tailwind

colors: {
  custom: {
    50: '#6871a9',
    500: '#183d85',
    950: '#000000',
  },
}

SCSS

$custom: #183d85;
$custom-light: #6871a9;
$custom-dark: #000000;

JSON

{
  "hex": "#183d85",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 133
  },
  "hsl": {
    "h": 219.633,
    "s": 69.427,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37903,
    "c": 0.12839,
    "h": 261.9
  },
  "luminance": 0.05225
}

Semantic roles & 50–950 ramp

primary

#183D85

secondary

#B99040

accent

#B03CEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183D85

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

Preview Lab → · Contrast checker → · Palette generator →