#183A63#183A63

#183A63 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.6% C 0.082 H 254.7°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#183A63
RGB	rgb(24, 58, 99)
HSL	hsl(213, 61%, 24%)
HSV	hsv(213, 76%, 39%)
CMYK	cmyk(75.8%, 41.4%, 0%, 61.2%)
CIE-LAB	lab(24.07, 3.24, -27.81)
CIE-LCH	lch(24.07, 28.00, 276.64°)
OKLab	oklab(34.61% -0.0217 -0.0792)
OKLCH	oklch(34.61% 0.082 254.7)
XYZ	xyz(4.1410, 4.1207, 12.3791)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A63 #634118

analogous

#186063 #183A63 #1C1863

triadic

#183A63 #63183A #3A6318

tetradic

#183A63 #631860 #634118 #18631C

square

#183A63 #631860 #634118 #18631C

split-complementary

#183A63 #631C18 #606318

monochromatic

#060E19 #0C1D32 #183A63 #245794 #3074C6

Accessibility & contrast

On white

11.51

#183A63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#183A63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A63

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A63	#FFFFFF	#000000	##FFFFFF
##183A63	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#273D65

Deuteranopia (green-blind)

#1C3662

Tritanopia (blue-blind)

#004449

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183a63;
/* rgb */ color: rgb(24, 58, 99);
/* oklch */ color: oklch(34.6% 0.082 254.7);

Tailwind

colors: {
  custom: {
    50: '#606f8f',
    500: '#183a63',
    950: '#000000',
  },
}

SCSS

$custom: #183a63;
$custom-light: #606f8f;
$custom-dark: #000000;

JSON

{
  "hex": "#183a63",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 99
  },
  "hsl": {
    "h": 212.8,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.34605,
    "c": 0.08216,
    "h": 254.7
  },
  "luminance": 0.04121
}

Semantic roles & 50–950 ramp

primary

#183A63

secondary

#99703E

accent

#9B44E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183A63

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

Preview Lab → · Contrast checker → · Palette generator →