#183E5D#183E5D

#183E5D is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.3% C 0.069 H 246.2°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#183E5D
RGB	rgb(24, 62, 93)
HSL	hsl(207, 59%, 23%)
HSV	hsv(207, 74%, 36%)
CMYK	cmyk(74.2%, 33.3%, 0%, 63.5%)
CIE-LAB	lab(25.04, -1.92, -22.37)
CIE-LCH	lch(25.04, 22.45, 265.09°)
OKLab	oklab(35.26% -0.0279 -0.0633)
OKLCH	oklch(35.26% 0.069 246.2)
XYZ	xyz(4.0743, 4.4293, 10.9940)
Luminance	0.0443 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E5D #5D3718

analogous

#185D59 #183E5D #181B5D

triadic

#183E5D #5D183E #3E5D18

tetradic

#183E5D #59185D #5D3718 #1B5D18

square

#183E5D #59185D #5D3718 #1B5D18

split-complementary

#183E5D #5D181B #5D5918

monochromatic

#061018 #0B1E2C #183E5D #255E8E #317FBE

Accessibility & contrast

On white

11.13

#183E5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183E5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E5D

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E5D	#FFFFFF	#000000	##FFFFFF
##183E5D	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303F5E

Deuteranopia (green-blind)

#27385C

Tritanopia (blue-blind)

#004549

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183e5d;
/* rgb */ color: rgb(24, 62, 93);
/* oklch */ color: oklch(35.3% 0.069 246.2);

Tailwind

colors: {
  custom: {
    50: '#5e738b',
    500: '#183e5d',
    950: '#000000',
  },
}

SCSS

$custom: #183e5d;
$custom-light: #5e738b;
$custom-dark: #000000;

JSON

{
  "hex": "#183e5d",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 93
  },
  "hsl": {
    "h": 206.957,
    "s": 58.974,
    "l": 22.941
  },
  "oklch": {
    "l": 0.35256,
    "c": 0.06918,
    "h": 246.2
  },
  "luminance": 0.0443
}

Semantic roles & 50–950 ramp

primary

#183E5D

secondary

#93643D

accent

#8C46E2

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #183E5D

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

Preview Lab → · Contrast checker → · Palette generator →