#183E5F#183E5F

#183E5F is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.4% C 0.072 H 247.7°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#183E5F
RGB	rgb(24, 62, 95)
HSL	hsl(208, 60%, 23%)
HSV	hsv(208, 75%, 37%)
CMYK	cmyk(74.7%, 34.7%, 0%, 62.7%)
CIE-LAB	lab(25.15, -1.12, -23.49)
CIE-LCH	lch(25.15, 23.52, 267.27°)
OKLab	oklab(35.38% -0.0273 -0.0666)
OKLCH	oklch(35.38% 0.072 247.7)
XYZ	xyz(4.1641, 4.4652, 11.4667)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E5F #5F3918

analogous

#185F5C #183E5F #181A5F

triadic

#183E5F #5F183E #3E5F18

tetradic

#183E5F #5C185F #5F3918 #1A5F18

square

#183E5F #5C185F #5F3918 #1A5F18

split-complementary

#183E5F #5F181A #5F5C18

monochromatic

#061018 #0C1E2E #183E5F #245E90 #317EC1

Accessibility & contrast

On white

11.09

#183E5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183E5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E5F

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E5F	#FFFFFF	#000000	##FFFFFF
##183E5F	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3F60

Deuteranopia (green-blind)

#25395E

Tritanopia (blue-blind)

#00464A

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183e5f;
/* rgb */ color: rgb(24, 62, 95);
/* oklch */ color: oklch(35.4% 0.072 247.7);

Tailwind

colors: {
  custom: {
    50: '#5f738c',
    500: '#183e5f',
    950: '#000000',
  },
}

SCSS

$custom: #183e5f;
$custom-light: #5f738c;
$custom-dark: #000000;

JSON

{
  "hex": "#183e5f",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 95
  },
  "hsl": {
    "h": 207.887,
    "s": 59.664,
    "l": 23.333
  },
  "oklch": {
    "l": 0.35379,
    "c": 0.07193,
    "h": 247.7
  },
  "luminance": 0.04466
}

Semantic roles & 50–950 ramp

primary

#183E5F

secondary

#95663D

accent

#8E45E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #183E5F

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

Preview Lab → · Contrast checker → · Palette generator →