#183C5C#183C5C

#183C5C is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.7% C 0.070 H 248.1°. Best body text is #FFFFFF at 11.41:1 contrast (WCAG AA passes).

Color values

HEX	#183C5C
RGB	rgb(24, 60, 92)
HSL	hsl(208, 59%, 23%)
HSV	hsv(208, 74%, 36%)
CMYK	cmyk(73.9%, 34.8%, 0%, 63.9%)
CIE-LAB	lab(24.32, -0.97, -22.86)
CIE-LCH	lch(24.32, 22.88, 267.56°)
OKLab	oklab(34.67% -0.026 -0.0647)
OKLCH	oklch(34.67% 0.07 248.1)
XYZ	xyz(3.9236, 4.1982, 10.7267)
Luminance	0.0420 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C5C #5C3818

analogous

#185C5A #183C5C #181A5C

triadic

#183C5C #5C183C #3C5C18

tetradic

#183C5C #5A185C #5C3818 #1A5C18

square

#183C5C #5A185C #5C3818 #1A5C18

split-complementary

#183C5C #5C181A #5C5A18

monochromatic

#061018 #0B1C2B #183C5C #255C8D #317BBD

Accessibility & contrast

On white

11.41

#183C5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183C5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C5C

11.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C5C	#FFFFFF	#000000	##FFFFFF
##183C5C	1.00	11.41	1.84	11.41
#FFFFFF	11.41	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3D5D

Deuteranopia (green-blind)

#24375B

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183c5c;
/* rgb */ color: rgb(24, 60, 92);
/* oklch */ color: oklch(34.7% 0.070 248.1);

Tailwind

colors: {
  custom: {
    50: '#5e718a',
    500: '#183c5c',
    950: '#000000',
  },
}

SCSS

$custom: #183c5c;
$custom-light: #5e718a;
$custom-dark: #000000;

JSON

{
  "hex": "#183c5c",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 92
  },
  "hsl": {
    "h": 208.235,
    "s": 58.621,
    "l": 22.745
  },
  "oklch": {
    "l": 0.34666,
    "c": 0.06976,
    "h": 248.1
  },
  "luminance": 0.04199
}

Semantic roles & 50–950 ramp

primary

#183C5C

secondary

#93653D

accent

#8F46E2

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05070B

muted

#797A7C

Preview Lab

Preview with #183C5C

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

Preview Lab → · Contrast checker → · Palette generator →