#183F60#183F60

#183F60 is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.7% C 0.072 H 247.2°. Best body text is #FFFFFF at 10.94:1 contrast (WCAG AA passes).

Color values

HEX	#183F60
RGB	rgb(24, 63, 96)
HSL	hsl(208, 60%, 24%)
HSV	hsv(208, 75%, 38%)
CMYK	cmyk(75%, 34.4%, 0%, 62.4%)
CIE-LAB	lab(25.54, -1.39, -23.53)
CIE-LCH	lch(25.54, 23.57, 266.61°)
OKLab	oklab(35.7% -0.0281 -0.0666)
OKLCH	oklch(35.7% 0.072 247.2)
XYZ	xyz(4.2647, 4.5933, 11.7259)
Luminance	0.0459 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F60 #603918

analogous

#18605D #183F60 #181B60

triadic

#183F60 #60183F #3F6018

tetradic

#183F60 #5D1860 #603918 #1B6018

square

#183F60 #5D1860 #603918 #1B6018

split-complementary

#183F60 #60181B #605D18

monochromatic

#061018 #0C1F2F #183F60 #245F91 #307FC2

Accessibility & contrast

On white

10.94

#183F60 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#183F60 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F60

10.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F60	#FFFFFF	#000000	##FFFFFF
##183F60	1.00	10.94	1.92	10.94
#FFFFFF	10.94	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304061

Deuteranopia (green-blind)

#26395F

Tritanopia (blue-blind)

#00474B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183f60;
/* rgb */ color: rgb(24, 63, 96);
/* oklch */ color: oklch(35.7% 0.072 247.2);

Tailwind

colors: {
  custom: {
    50: '#5f738d',
    500: '#183f60',
    950: '#000000',
  },
}

SCSS

$custom: #183f60;
$custom-light: #5f738d;
$custom-dark: #000000;

JSON

{
  "hex": "#183f60",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 96
  },
  "hsl": {
    "h": 207.5,
    "s": 60,
    "l": 23.529
  },
  "oklch": {
    "l": 0.35704,
    "c": 0.07232,
    "h": 247.2
  },
  "luminance": 0.04594
}

Semantic roles & 50–950 ramp

primary

#183F60

secondary

#96663D

accent

#8D45E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #183F60

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

Preview Lab → · Contrast checker → · Palette generator →