#183E53#183E53

#183E53 is a dark, muted cyan. Relative luminance 0.043; OKLCH L 34.7% C 0.056 H 235.9°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#183E53
RGB	rgb(24, 62, 83)
HSL	hsl(201, 55%, 21%)
HSV	hsv(201, 71%, 33%)
CMYK	cmyk(71.1%, 25.3%, 0%, 67.5%)
CIE-LAB	lab(24.52, -5.83, -16.64)
CIE-LCH	lch(24.52, 17.63, 250.69°)
OKLab	oklab(34.67% -0.0317 -0.0467)
OKLCH	oklch(34.67% 0.056 235.9)
XYZ	xyz(3.6600, 4.2636, 8.8120)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E53 #532D18

analogous

#18534A #183E53 #182053

triadic

#183E53 #53183E #3E5318

tetradic

#183E53 #4A1853 #532D18 #205318

square

#183E53 #4A1853 #532D18 #205318

split-complementary

#183E53 #531820 #534A18

monochromatic

#071218 #0A1B24 #183E53 #266182 #3385B2

Accessibility & contrast

On white

11.33

#183E53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#183E53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E53

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E53	#FFFFFF	#000000	##FFFFFF
##183E53	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343E54

Deuteranopia (green-blind)

#2C3853

Tritanopia (blue-blind)

#004345

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183e53;
/* rgb */ color: rgb(24, 62, 83);
/* oklch */ color: oklch(34.7% 0.056 235.9);

Tailwind

colors: {
  custom: {
    50: '#5c7383',
    500: '#183e53',
    950: '#000000',
  },
}

SCSS

$custom: #183e53;
$custom-light: #5c7383;
$custom-dark: #000000;

JSON

{
  "hex": "#183e53",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 83
  },
  "hsl": {
    "h": 201.356,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.34675,
    "c": 0.05642,
    "h": 235.9
  },
  "luminance": 0.04264
}

Semantic roles & 50–950 ramp

primary

#183E53

secondary

#8A583D

accent

#7E49DE

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183E53

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

Preview Lab → · Contrast checker → · Palette generator →