#183D73#183D73

#183D73 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.5% C 0.102 H 258.2°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#183D73
RGB	rgb(24, 61, 115)
HSL	hsl(216, 65%, 27%)
HSV	hsv(216, 79%, 45%)
CMYK	cmyk(79.1%, 47%, 0%, 54.9%)
CIE-LAB	lab(26.07, 7.75, -34.88)
CIE-LCH	lch(26.07, 35.73, 282.52°)
OKLab	oklab(36.49% -0.0209 -0.1)
OKLCH	oklch(36.49% 0.102 258.2)
XYZ	xyz(5.1388, 4.7689, 16.8660)
Luminance	0.0477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D73 #734E18

analogous

#186B73 #183D73 #201873

triadic

#183D73 #73183D #3D7318

tetradic

#183D73 #73186B #734E18 #187320

square

#183D73 #73186B #734E18 #187320

split-complementary

#183D73 #732018 #6B7318

monochromatic

#050D19 #0D2240 #183D73 #2358A6 #3173D4

Accessibility & contrast

On white

10.75

#183D73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#183D73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D73

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D73	#FFFFFF	#000000	##FFFFFF
##183D73	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214275

Deuteranopia (green-blind)

#0E3A72

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183d73;
/* rgb */ color: rgb(24, 61, 115);
/* oklch */ color: oklch(36.5% 0.102 258.2);

Tailwind

colors: {
  custom: {
    50: '#63729c',
    500: '#183d73',
    950: '#000000',
  },
}

SCSS

$custom: #183d73;
$custom-light: #63729c;
$custom-dark: #000000;

JSON

{
  "hex": "#183d73",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 115
  },
  "hsl": {
    "h": 215.604,
    "s": 65.468,
    "l": 27.255
  },
  "oklch": {
    "l": 0.36493,
    "c": 0.10214,
    "h": 258.2
  },
  "luminance": 0.04769
}

Semantic roles & 50–950 ramp

primary

#183D73

secondary

#A87D3F

accent

#A43FE8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183D73

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

Preview Lab → · Contrast checker → · Palette generator →