#183F73#183F73

#183F73 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 37.0% C 0.100 H 256.8°. Best body text is #FFFFFF at 10.51:1 contrast (WCAG AA passes).

Color values

HEX	#183F73
RGB	rgb(24, 63, 115)
HSL	hsl(214, 65%, 27%)
HSV	hsv(214, 79%, 45%)
CMYK	cmyk(79.1%, 45.2%, 0%, 54.9%)
CIE-LAB	lab(26.70, 6.36, -33.87)
CIE-LCH	lch(26.70, 34.46, 280.63°)
OKLab	oklab(36.98% -0.0228 -0.097)
OKLCH	oklch(36.98% 0.1 256.8)
XYZ	xyz(5.2476, 4.9864, 16.9022)
Luminance	0.0499 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F73 #734C18

analogous

#186D73 #183F73 #1F1873

triadic

#183F73 #73183F #3F7318

tetradic

#183F73 #73186D #734C18 #18731F

square

#183F73 #73186D #734C18 #18731F

split-complementary

#183F73 #731F18 #6D7318

monochromatic

#050E19 #0D2340 #183F73 #235BA6 #3177D4

Accessibility & contrast

On white

10.51

#183F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#183F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F73

10.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F73	#FFFFFF	#000000	##FFFFFF
##183F73	1.00	10.51	2.00	10.51
#FFFFFF	10.51	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254475

Deuteranopia (green-blind)

#143B72

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183f73;
/* rgb */ color: rgb(24, 63, 115);
/* oklch */ color: oklch(37.0% 0.100 256.8);

Tailwind

colors: {
  custom: {
    50: '#63739c',
    500: '#183f73',
    950: '#000000',
  },
}

SCSS

$custom: #183f73;
$custom-light: #63739c;
$custom-dark: #000000;

JSON

{
  "hex": "#183f73",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 115
  },
  "hsl": {
    "h": 214.286,
    "s": 65.468,
    "l": 27.255
  },
  "oklch": {
    "l": 0.3698,
    "c": 0.09961,
    "h": 256.8
  },
  "luminance": 0.04987
}

Semantic roles & 50–950 ramp

primary

#183F73

secondary

#A87B3F

accent

#A03FE8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183F73

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

Preview Lab → · Contrast checker → · Palette generator →