#183D64#183D64

#183D64 is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.4% C 0.080 H 252.1°. Best body text is #FFFFFF at 11.11:1 contrast (WCAG AA passes).

Color values

HEX	#183D64
RGB	rgb(24, 61, 100)
HSL	hsl(211, 61%, 24%)
HSV	hsv(211, 76%, 39%)
CMYK	cmyk(76%, 39%, 0%, 60.8%)
CIE-LAB	lab(25.11, 1.58, -26.80)
CIE-LCH	lch(25.11, 26.84, 273.37°)
OKLab	oklab(35.44% -0.0246 -0.0762)
OKLCH	oklch(35.44% 0.08 252.1)
XYZ	xyz(4.3448, 4.4513, 12.6843)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D64 #643F18

analogous

#186364 #183D64 #191864

triadic

#183D64 #64183D #3D6418

tetradic

#183D64 #641863 #643F18 #186419

square

#183D64 #641863 #643F18 #186419

split-complementary

#183D64 #641918 #636418

monochromatic

#060F19 #0C1F33 #183D64 #245B95 #3079C7

Accessibility & contrast

On white

11.11

#183D64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183D64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D64

11.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D64	#FFFFFF	#000000	##FFFFFF
##183D64	1.00	11.11	1.89	11.11
#FFFFFF	11.11	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3F66

Deuteranopia (green-blind)

#203863

Tritanopia (blue-blind)

#00464B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183d64;
/* rgb */ color: rgb(24, 61, 100);
/* oklch */ color: oklch(35.4% 0.080 252.1);

Tailwind

colors: {
  custom: {
    50: '#607290',
    500: '#183d64',
    950: '#000000',
  },
}

SCSS

$custom: #183d64;
$custom-light: #607290;
$custom-dark: #000000;

JSON

{
  "hex": "#183d64",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 100
  },
  "hsl": {
    "h": 210.789,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.3544,
    "c": 0.08012,
    "h": 252.1
  },
  "luminance": 0.04452
}

Semantic roles & 50–950 ramp

primary

#183D64

secondary

#9A6D3E

accent

#9643E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183D64

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

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