#183F72#183F72

#183F72 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 36.9% C 0.098 H 256.4°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#183F72
RGB	rgb(24, 63, 114)
HSL	hsl(214, 65%, 27%)
HSV	hsv(214, 79%, 45%)
CMYK	cmyk(78.9%, 44.7%, 0%, 55.3%)
CIE-LAB	lab(26.63, 5.94, -33.34)
CIE-LCH	lch(26.63, 33.87, 280.10°)
OKLab	oklab(36.91% -0.0231 -0.0954)
OKLCH	oklch(36.91% 0.098 256.4)
XYZ	xyz(5.1903, 4.9635, 16.6008)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F72 #724B18

analogous

#186C72 #183F72 #1E1872

triadic

#183F72 #72183F #3F7218

tetradic

#183F72 #72186C #724B18 #18721E

square

#183F72 #72186C #724B18 #18721E

split-complementary

#183F72 #721E18 #6C7218

monochromatic

#050E19 #0D233F #183F72 #235BA5 #3177D4

Accessibility & contrast

On white

10.54

#183F72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#183F72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F72

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F72	#FFFFFF	#000000	##FFFFFF
##183F72	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264374

Deuteranopia (green-blind)

#163B71

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183f72;
/* rgb */ color: rgb(24, 63, 114);
/* oklch */ color: oklch(36.9% 0.098 256.4);

Tailwind

colors: {
  custom: {
    50: '#63739b',
    500: '#183f72',
    950: '#000000',
  },
}

SCSS

$custom: #183f72;
$custom-light: #63739b;
$custom-dark: #000000;

JSON

{
  "hex": "#183f72",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 114
  },
  "hsl": {
    "h": 214,
    "s": 65.217,
    "l": 27.059
  },
  "oklch": {
    "l": 0.36908,
    "c": 0.09815,
    "h": 256.4
  },
  "luminance": 0.04964
}

Semantic roles & 50–950 ramp

primary

#183F72

secondary

#A77A3E

accent

#9F40E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183F72

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

Preview Lab → · Contrast checker → · Palette generator →