#183E63#183E63

#183E63 is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.6% C 0.078 H 250.4°. Best body text is #FFFFFF at 11.01:1 contrast (WCAG AA passes).

Color values

HEX	#183E63
RGB	rgb(24, 62, 99)
HSL	hsl(210, 61%, 24%)
HSV	hsv(210, 76%, 39%)
CMYK	cmyk(75.8%, 37.4%, 0%, 61.2%)
CIE-LAB	lab(25.38, 0.49, -25.72)
CIE-LCH	lch(25.38, 25.73, 271.09°)
OKLab	oklab(35.63% -0.026 -0.0731)
OKLCH	oklch(35.63% 0.078 250.4)
XYZ	xyz(4.3506, 4.5398, 12.4489)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E63 #633D18

analogous

#186363 #183E63 #181963

triadic

#183E63 #63183E #3E6318

tetradic

#183E63 #631863 #633D18 #196318

square

#183E63 #631863 #633D18 #196318

split-complementary

#183E63 #631819 #636318

monochromatic

#060F19 #0C1F32 #183E63 #245D94 #307CC6

Accessibility & contrast

On white

11.01

#183E63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#183E63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E63

11.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E63	#FFFFFF	#000000	##FFFFFF
##183E63	1.00	11.01	1.91	11.01
#FFFFFF	11.01	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D4065

Deuteranopia (green-blind)

#223962

Tritanopia (blue-blind)

#00474B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183e63;
/* rgb */ color: rgb(24, 62, 99);
/* oklch */ color: oklch(35.6% 0.078 250.4);

Tailwind

colors: {
  custom: {
    50: '#60738f',
    500: '#183e63',
    950: '#000000',
  },
}

SCSS

$custom: #183e63;
$custom-light: #60738f;
$custom-dark: #000000;

JSON

{
  "hex": "#183e63",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 99
  },
  "hsl": {
    "h": 209.6,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.35633,
    "c": 0.07757,
    "h": 250.4
  },
  "luminance": 0.0454
}

Semantic roles & 50–950 ramp

primary

#183E63

secondary

#996B3E

accent

#9344E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #183E63

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

Preview Lab → · Contrast checker → · Palette generator →