#183D4F#183D4F

#183D4F is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.2% C 0.052 H 232.3°. Best body text is #FFFFFF at 11.54:1 contrast (WCAG AA passes).

Color values

HEX	#183D4F
RGB	rgb(24, 61, 79)
HSL	hsl(200, 53%, 20%)
HSV	hsv(200, 70%, 31%)
CMYK	cmyk(69.6%, 22.8%, 0%, 69%)
CIE-LAB	lab(23.99, -6.70, -14.84)
CIE-LCH	lch(23.99, 16.28, 245.69°)
OKLab	oklab(34.18% -0.0321 -0.0415)
OKLCH	oklch(34.18% 0.052 232.3)
XYZ	xyz(3.4562, 4.0958, 8.0041)
Luminance	0.0410 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D4F #4F2A18

analogous

#184F45 #183D4F #18224F

triadic

#183D4F #4F183D #3D4F18

tetradic

#183D4F #45184F #4F2A18 #224F18

square

#183D4F #45184F #4F2A18 #224F18

split-complementary

#183D4F #4F1822 #4F4518

monochromatic

#071217 #0A1920 #183D4F #26617E #3585AD

Accessibility & contrast

On white

11.54

#183D4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#183D4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D4F

11.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D4F	#FFFFFF	#000000	##FFFFFF
##183D4F	1.00	11.54	1.82	11.54
#FFFFFF	11.54	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343C50

Deuteranopia (green-blind)

#2C374F

Tritanopia (blue-blind)

#004243

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183d4f;
/* rgb */ color: rgb(24, 61, 79);
/* oklch */ color: oklch(34.2% 0.052 232.3);

Tailwind

colors: {
  custom: {
    50: '#5c7280',
    500: '#183d4f',
    950: '#000000',
  },
}

SCSS

$custom: #183d4f;
$custom-light: #5c7280;
$custom-dark: #000000;

JSON

{
  "hex": "#183d4f",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 79
  },
  "hsl": {
    "h": 199.636,
    "s": 53.398,
    "l": 20.196
  },
  "oklch": {
    "l": 0.34183,
    "c": 0.05249,
    "h": 232.3
  },
  "luminance": 0.04096
}

Semantic roles & 50–950 ramp

primary

#183D4F

secondary

#86553D

accent

#7B4BDD

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183D4F

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

Preview Lab → · Contrast checker → · Palette generator →