#183A4E#183A4E

#183A4E is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.3% C 0.053 H 237.2°. Best body text is #FFFFFF at 11.97:1 contrast (WCAG AA passes).

Color values

HEX	#183A4E
RGB	rgb(24, 58, 78)
HSL	hsl(202, 53%, 20%)
HSV	hsv(202, 69%, 31%)
CMYK	cmyk(69.2%, 25.6%, 0%, 69.4%)
CIE-LAB	lab(22.90, -5.13, -15.87)
CIE-LCH	lch(22.90, 16.67, 252.09°)
OKLab	oklab(33.3% -0.0287 -0.0445)
OKLCH	oklch(33.3% 0.053 237.2)
XYZ	xyz(3.2644, 3.7700, 7.7619)
Luminance	0.0377 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A4E #4E2C18

analogous

#184E47 #183A4E #181F4E

triadic

#183A4E #4E183A #3A4E18

tetradic

#183A4E #47184E #4E2C18 #1F4E18

square

#183A4E #47184E #4E2C18 #1F4E18

split-complementary

#183A4E #4E181F #4E4718

monochromatic

#071117 #0A171F #183A4E #265D7D #3580AC

Accessibility & contrast

On white

11.97

#183A4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#183A4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A4E

11.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A4E	#FFFFFF	#000000	##FFFFFF
##183A4E	1.00	11.97	1.75	11.97
#FFFFFF	11.97	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313A4F

Deuteranopia (green-blind)

#29344E

Tritanopia (blue-blind)

#003F41

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #183a4e;
/* rgb */ color: rgb(24, 58, 78);
/* oklch */ color: oklch(33.3% 0.053 237.2);

Tailwind

colors: {
  custom: {
    50: '#5b707f',
    500: '#183a4e',
    950: '#000000',
  },
}

SCSS

$custom: #183a4e;
$custom-light: #5b707f;
$custom-dark: #000000;

JSON

{
  "hex": "#183a4e",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 78
  },
  "hsl": {
    "h": 202.222,
    "s": 52.941,
    "l": 20
  },
  "oklch": {
    "l": 0.33301,
    "c": 0.05297,
    "h": 237.2
  },
  "luminance": 0.0377
}

Semantic roles & 50–950 ramp

primary

#183A4E

secondary

#85583D

accent

#814BDC

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183A4E

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

Preview Lab → · Contrast checker → · Palette generator →