#183D63#183D63

#183D63 is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.4% C 0.079 H 251.5°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#183D63
RGB	rgb(24, 61, 99)
HSL	hsl(210, 61%, 24%)
HSV	hsv(210, 76%, 39%)
CMYK	cmyk(75.8%, 38.4%, 0%, 61.2%)
CIE-LAB	lab(25.05, 1.17, -26.25)
CIE-LCH	lch(25.05, 26.27, 272.55°)
OKLab	oklab(35.37% -0.0249 -0.0746)
OKLCH	oklch(35.37% 0.079 251.5)
XYZ	xyz(4.2967, 4.4321, 12.4310)
Luminance	0.0443 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D63 #633E18

analogous

#186363 #183D63 #191863

triadic

#183D63 #63183D #3D6318

tetradic

#183D63 #631863 #633E18 #186319

square

#183D63 #631863 #633E18 #186319

split-complementary

#183D63 #631918 #636318

monochromatic

#060F19 #0C1F32 #183D63 #245B94 #307AC6

Accessibility & contrast

On white

11.13

#183D63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183D63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D63

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D63	#FFFFFF	#000000	##FFFFFF
##183D63	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)

#2C3F65

Deuteranopia (green-blind)

#213862

Tritanopia (blue-blind)

#00464B

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183d63;
/* rgb */ color: rgb(24, 61, 99);
/* oklch */ color: oklch(35.4% 0.079 251.5);

Tailwind

colors: {
  custom: {
    50: '#60728f',
    500: '#183d63',
    950: '#000000',
  },
}

SCSS

$custom: #183d63;
$custom-light: #60728f;
$custom-dark: #000000;

JSON

{
  "hex": "#183d63",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 99
  },
  "hsl": {
    "h": 210.4,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.35374,
    "c": 0.07867,
    "h": 251.5
  },
  "luminance": 0.04433
}

Semantic roles & 50–950 ramp

primary

#183D63

secondary

#996C3E

accent

#9544E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183D63

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

Preview Lab → · Contrast checker → · Palette generator →