#183A64#183A64

#183A64 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.7% C 0.084 H 255.2°. Best body text is #FFFFFF at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#183A64
RGB	rgb(24, 58, 100)
HSL	hsl(213, 61%, 24%)
HSV	hsv(213, 76%, 39%)
CMYK	cmyk(76%, 42%, 0%, 60.8%)
CIE-LAB	lab(24.13, 3.65, -28.36)
CIE-LCH	lch(24.13, 28.59, 277.33°)
OKLab	oklab(34.67% -0.0214 -0.0809)
OKLCH	oklch(34.67% 0.084 255.2)
XYZ	xyz(4.1891, 4.1399, 12.6324)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A64 #644218

analogous

#186064 #183A64 #1C1864

triadic

#183A64 #64183A #3A6418

tetradic

#183A64 #641860 #644218 #18641C

square

#183A64 #641860 #644218 #18641C

split-complementary

#183A64 #641C18 #606418

monochromatic

#060E19 #0C1D33 #183A64 #245795 #3073C7

Accessibility & contrast

On white

11.49

#183A64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183A64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A64

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A64	#FFFFFF	#000000	##FFFFFF
##183A64	1.00	11.49	1.83	11.49
#FFFFFF	11.49	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#263D66

Deuteranopia (green-blind)

#1B3663

Tritanopia (blue-blind)

#00444A

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183a64;
/* rgb */ color: rgb(24, 58, 100);
/* oklch */ color: oklch(34.7% 0.084 255.2);

Tailwind

colors: {
  custom: {
    50: '#606f90',
    500: '#183a64',
    950: '#000000',
  },
}

SCSS

$custom: #183a64;
$custom-light: #606f90;
$custom-dark: #000000;

JSON

{
  "hex": "#183a64",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 100
  },
  "hsl": {
    "h": 213.158,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.34674,
    "c": 0.08365,
    "h": 255.2
  },
  "luminance": 0.0414
}

Semantic roles & 50–950 ramp

primary

#183A64

secondary

#9A713E

accent

#9C43E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183A64

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

Preview Lab → · Contrast checker → · Palette generator →