#183D72#183D72

#183D72 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.4% C 0.101 H 257.9°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#183D72
RGB	rgb(24, 61, 114)
HSL	hsl(215, 65%, 27%)
HSV	hsv(215, 79%, 45%)
CMYK	cmyk(78.9%, 46.5%, 0%, 55.3%)
CIE-LAB	lab(26.00, 7.33, -34.36)
CIE-LCH	lch(26.00, 35.13, 282.05°)
OKLab	oklab(36.42% -0.0211 -0.0984)
OKLCH	oklch(36.42% 0.101 257.9)
XYZ	xyz(5.0816, 4.7460, 16.5646)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D72 #724D18

analogous

#186A72 #183D72 #201872

triadic

#183D72 #72183D #3D7218

tetradic

#183D72 #72186A #724D18 #187220

square

#183D72 #72186A #724D18 #187220

split-complementary

#183D72 #722018 #6A7218

monochromatic

#050E19 #0D223F #183D72 #2358A5 #3174D4

Accessibility & contrast

On white

10.77

#183D72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#183D72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D72

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D72	#FFFFFF	#000000	##FFFFFF
##183D72	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224274

Deuteranopia (green-blind)

#103A71

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183d72;
/* rgb */ color: rgb(24, 61, 114);
/* oklch */ color: oklch(36.4% 0.101 257.9);

Tailwind

colors: {
  custom: {
    50: '#63729b',
    500: '#183d72',
    950: '#000000',
  },
}

SCSS

$custom: #183d72;
$custom-light: #63729b;
$custom-dark: #000000;

JSON

{
  "hex": "#183d72",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 114
  },
  "hsl": {
    "h": 215.333,
    "s": 65.217,
    "l": 27.059
  },
  "oklch": {
    "l": 0.36419,
    "c": 0.10067,
    "h": 257.9
  },
  "luminance": 0.04747
}

Semantic roles & 50–950 ramp

primary

#183D72

secondary

#A77C3E

accent

#A340E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183D72

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

Preview Lab → · Contrast checker → · Palette generator →