#183F56#183F56

#183F56 is a dark, muted cyan. Relative luminance 0.044; OKLCH L 35.1% C 0.059 H 237.7°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX	#183F56
RGB	rgb(24, 63, 86)
HSL	hsl(202, 56%, 22%)
HSV	hsv(202, 72%, 34%)
CMYK	cmyk(72.1%, 26.7%, 0%, 66.3%)
CIE-LAB	lab(25.02, -5.33, -17.84)
CIE-LCH	lch(25.02, 18.62, 253.38°)
OKLab	oklab(35.12% -0.0317 -0.0502)
OKLCH	oklch(35.12% 0.059 237.7)
XYZ	xyz(3.8333, 4.4207, 9.4536)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F56 #562F18

analogous

#18564E #183F56 #182056

triadic

#183F56 #56183F #3F5618

tetradic

#183F56 #4E1856 #562F18 #205618

square

#183F56 #4E1856 #562F18 #205618

split-complementary

#183F56 #561820 #564E18

monochromatic

#071218 #0B1C26 #183F56 #256286 #3385B6

Accessibility & contrast

On white

11.15

#183F56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#183F56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F56

11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F56	#FFFFFF	#000000	##FFFFFF
##183F56	1.00	11.15	1.88	11.15
#FFFFFF	11.15	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343F57

Deuteranopia (green-blind)

#2C3956

Tritanopia (blue-blind)

#004547

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183f56;
/* rgb */ color: rgb(24, 63, 86);
/* oklch */ color: oklch(35.1% 0.059 237.7);

Tailwind

colors: {
  custom: {
    50: '#5d7485',
    500: '#183f56',
    950: '#000000',
  },
}

SCSS

$custom: #183f56;
$custom-light: #5d7485;
$custom-dark: #000000;

JSON

{
  "hex": "#183f56",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 86
  },
  "hsl": {
    "h": 202.258,
    "s": 56.364,
    "l": 21.569
  },
  "oklch": {
    "l": 0.35115,
    "c": 0.05933,
    "h": 237.7
  },
  "luminance": 0.04421
}

Semantic roles & 50–950 ramp

primary

#183F56

secondary

#8D5B3D

accent

#8048E0

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #183F56

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

Preview Lab → · Contrast checker → · Palette generator →