#183B64#183B64

#183B64 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.9% C 0.082 H 254.2°. Best body text is #FFFFFF at 11.36:1 contrast (WCAG AA passes).

Color values

HEX	#183B64
RGB	rgb(24, 59, 100)
HSL	hsl(212, 61%, 24%)
HSV	hsv(212, 76%, 39%)
CMYK	cmyk(76%, 41%, 0%, 60.8%)
CIE-LAB	lab(24.46, 2.95, -27.84)
CIE-LCH	lch(24.46, 27.99, 276.06°)
OKLab	oklab(34.93% -0.0225 -0.0793)
OKLCH	oklch(34.93% 0.082 254.2)
XYZ	xyz(4.2401, 4.2418, 12.6494)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B64 #644118

analogous

#186164 #183B64 #1B1864

triadic

#183B64 #64183B #3B6418

tetradic

#183B64 #641861 #644118 #18641B

square

#183B64 #641861 #644118 #18641B

split-complementary

#183B64 #641B18 #616418

monochromatic

#060F19 #0C1E33 #183B64 #245895 #3075C7

Accessibility & contrast

On white

11.36

#183B64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#183B64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B64

11.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B64	#FFFFFF	#000000	##FFFFFF
##183B64	1.00	11.36	1.85	11.36
#FFFFFF	11.36	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#283E66

Deuteranopia (green-blind)

#1C3763

Tritanopia (blue-blind)

#00454A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183b64;
/* rgb */ color: rgb(24, 59, 100);
/* oklch */ color: oklch(34.9% 0.082 254.2);

Tailwind

colors: {
  custom: {
    50: '#607090',
    500: '#183b64',
    950: '#000000',
  },
}

SCSS

$custom: #183b64;
$custom-light: #607090;
$custom-dark: #000000;

JSON

{
  "hex": "#183b64",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 100
  },
  "hsl": {
    "h": 212.368,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.34928,
    "c": 0.08244,
    "h": 254.2
  },
  "luminance": 0.04242
}

Semantic roles & 50–950 ramp

primary

#183B64

secondary

#9A703E

accent

#9A43E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183B64

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

Preview Lab → · Contrast checker → · Palette generator →