#183B63#183B63

#183B63 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.9% C 0.081 H 253.7°. Best body text is #FFFFFF at 11.38:1 contrast (WCAG AA passes).

Color values

HEX	#183B63
RGB	rgb(24, 59, 99)
HSL	hsl(212, 61%, 24%)
HSV	hsv(212, 76%, 39%)
CMYK	cmyk(75.8%, 40.4%, 0%, 61.2%)
CIE-LAB	lab(24.39, 2.55, -27.29)
CIE-LCH	lch(24.39, 27.41, 275.33°)
OKLab	oklab(34.86% -0.0228 -0.0777)
OKLCH	oklch(34.86% 0.081 253.7)
XYZ	xyz(4.1920, 4.2225, 12.3961)
Luminance	0.0422 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B63 #634018

analogous

#186163 #183B63 #1B1863

triadic

#183B63 #63183B #3B6318

tetradic

#183B63 #631861 #634018 #18631B

square

#183B63 #631861 #634018 #18631B

split-complementary

#183B63 #631B18 #616318

monochromatic

#060F19 #0C1E32 #183B63 #245894 #3076C6

Accessibility & contrast

On white

11.38

#183B63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183B63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B63

11.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B63	#FFFFFF	#000000	##FFFFFF
##183B63	1.00	11.38	1.84	11.38
#FFFFFF	11.38	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#293E65

Deuteranopia (green-blind)

#1D3762

Tritanopia (blue-blind)

#00444A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183b63;
/* rgb */ color: rgb(24, 59, 99);
/* oklch */ color: oklch(34.9% 0.081 253.7);

Tailwind

colors: {
  custom: {
    50: '#60708f',
    500: '#183b63',
    950: '#000000',
  },
}

SCSS

$custom: #183b63;
$custom-light: #60708f;
$custom-dark: #000000;

JSON

{
  "hex": "#183b63",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 99
  },
  "hsl": {
    "h": 212,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.3486,
    "c": 0.08096,
    "h": 253.7
  },
  "luminance": 0.04223
}

Semantic roles & 50–950 ramp

primary

#183B63

secondary

#996E3E

accent

#9944E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183B63

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

Preview Lab → · Contrast checker → · Palette generator →