#183D4B#183D4B

#183D4B is a dark, muted cyan. Relative luminance 0.040; OKLCH L 34.0% C 0.049 H 225.8°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#183D4B
RGB	rgb(24, 61, 75)
HSL	hsl(196, 52%, 19%)
HSV	hsv(196, 68%, 29%)
CMYK	cmyk(68%, 18.7%, 0%, 70.6%)
CIE-LAB	lab(23.80, -8.20, -12.48)
CIE-LCH	lch(23.80, 14.93, 236.71°)
OKLab	oklab(33.98% -0.0338 -0.0348)
OKLCH	oklch(33.98% 0.049 225.8)
XYZ	xyz(3.3149, 4.0393, 7.2602)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D4B #4B2618

analogous

#184B40 #183D4B #18244B

triadic

#183D4B #4B183D #3D4B18

tetradic

#183D4B #40184B #4B2618 #244B18

square

#183D4B #40184B #4B2618 #244B18

split-complementary

#183D4B #4B1824 #4B4018

monochromatic

#071317 #09171D #183D4B #276379 #3688A8

Accessibility & contrast

On white

11.62

#183D4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#183D4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D4B

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D4B	#FFFFFF	#000000	##FFFFFF
##183D4B	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353C4C

Deuteranopia (green-blind)

#2E364B

Tritanopia (blue-blind)

#004142

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183d4b;
/* rgb */ color: rgb(24, 61, 75);
/* oklch */ color: oklch(34.0% 0.049 225.8);

Tailwind

colors: {
  custom: {
    50: '#5b727d',
    500: '#183d4b',
    950: '#000000',
  },
}

SCSS

$custom: #183d4b;
$custom-light: #5b727d;
$custom-dark: #000000;

JSON

{
  "hex": "#183d4b",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 75
  },
  "hsl": {
    "h": 196.471,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.33975,
    "c": 0.04851,
    "h": 225.8
  },
  "luminance": 0.0404
}

Semantic roles & 50–950 ramp

primary

#183D4B

secondary

#82503D

accent

#744DDB

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #183D4B

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

Preview Lab → · Contrast checker → · Palette generator →