#183C5D#183C5D

#183C5D is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.7% C 0.071 H 248.9°. Best body text is #FFFFFF at 11.39:1 contrast (WCAG AA passes).

Color values

HEX	#183C5D
RGB	rgb(24, 60, 93)
HSL	hsl(209, 59%, 23%)
HSV	hsv(209, 74%, 36%)
CMYK	cmyk(74.2%, 35.5%, 0%, 63.5%)
CIE-LAB	lab(24.37, -0.57, -23.42)
CIE-LCH	lch(24.37, 23.43, 268.60°)
OKLab	oklab(34.73% -0.0257 -0.0664)
OKLCH	oklch(34.73% 0.071 248.9)
XYZ	xyz(3.9676, 4.2158, 10.9584)
Luminance	0.0422 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C5D #5D3918

analogous

#185D5B #183C5D #18195D

triadic

#183C5D #5D183C #3C5D18

tetradic

#183C5D #5B185D #5D3918 #195D18

square

#183C5D #5B185D #5D3918 #195D18

split-complementary

#183C5D #5D1819 #5D5B18

monochromatic

#061018 #0B1D2C #183C5D #255B8E #317BBE

Accessibility & contrast

On white

11.39

#183C5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183C5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C5D

11.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C5D	#FFFFFF	#000000	##FFFFFF
##183C5D	1.00	11.39	1.84	11.39
#FFFFFF	11.39	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D3E5E

Deuteranopia (green-blind)

#24375C

Tritanopia (blue-blind)

#004448

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183c5d;
/* rgb */ color: rgb(24, 60, 93);
/* oklch */ color: oklch(34.7% 0.071 248.9);

Tailwind

colors: {
  custom: {
    50: '#5e718b',
    500: '#183c5d',
    950: '#000000',
  },
}

SCSS

$custom: #183c5d;
$custom-light: #5e718b;
$custom-dark: #000000;

JSON

{
  "hex": "#183c5d",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 93
  },
  "hsl": {
    "h": 208.696,
    "s": 58.974,
    "l": 22.941
  },
  "oklch": {
    "l": 0.34728,
    "c": 0.07118,
    "h": 248.9
  },
  "luminance": 0.04216
}

Semantic roles & 50–950 ramp

primary

#183C5D

secondary

#93673D

accent

#9046E2

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183C5D

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

Preview Lab → · Contrast checker → · Palette generator →