#183D4E#183D4E

#183D4E is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.1% C 0.051 H 230.8°. Best body text is #FFFFFF at 11.56:1 contrast (WCAG AA passes).

Color values

HEX	#183D4E
RGB	rgb(24, 61, 78)
HSL	hsl(199, 53%, 20%)
HSV	hsv(199, 69%, 31%)
CMYK	cmyk(69.2%, 21.8%, 0%, 69.4%)
CIE-LAB	lab(23.94, -7.08, -14.25)
CIE-LCH	lch(23.94, 15.91, 243.58°)
OKLab	oklab(34.13% -0.0325 -0.0398)
OKLCH	oklch(34.13% 0.051 230.8)
XYZ	xyz(3.4200, 4.0814, 7.8138)
Luminance	0.0408 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D4E #4E2918

analogous

#184E44 #183D4E #18224E

triadic

#183D4E #4E183D #3D4E18

tetradic

#183D4E #44184E #4E2918 #224E18

square

#183D4E #44184E #4E2918 #224E18

split-complementary

#183D4E #4E1822 #4E4418

monochromatic

#071217 #0A181F #183D4E #26627D #3586AC

Accessibility & contrast

On white

11.56

#183D4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#183D4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D4E

11.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D4E	#FFFFFF	#000000	##FFFFFF
##183D4E	1.00	11.56	1.82	11.56
#FFFFFF	11.56	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343C4F

Deuteranopia (green-blind)

#2D374E

Tritanopia (blue-blind)

#004243

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183d4e;
/* rgb */ color: rgb(24, 61, 78);
/* oklch */ color: oklch(34.1% 0.051 230.8);

Tailwind

colors: {
  custom: {
    50: '#5c727f',
    500: '#183d4e',
    950: '#000000',
  },
}

SCSS

$custom: #183d4e;
$custom-light: #5c727f;
$custom-dark: #000000;

JSON

{
  "hex": "#183d4e",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 78
  },
  "hsl": {
    "h": 198.889,
    "s": 52.941,
    "l": 20
  },
  "oklch": {
    "l": 0.3413,
    "c": 0.05142,
    "h": 230.8
  },
  "luminance": 0.04082
}

Semantic roles & 50–950 ramp

primary

#183D4E

secondary

#85543D

accent

#794BDC

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183D4E

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

Preview Lab → · Contrast checker → · Palette generator →