#183563#183563

#183563 is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.3% C 0.088 H 259.3°. Best body text is #FFFFFF at 12.15:1 contrast (WCAG AA passes).

Color values

HEX	#183563
RGB	rgb(24, 53, 99)
HSL	hsl(217, 61%, 24%)
HSV	hsv(217, 76%, 39%)
CMYK	cmyk(75.8%, 46.5%, 0%, 61.2%)
CIE-LAB	lab(22.45, 6.75, -30.39)
CIE-LCH	lch(22.45, 31.13, 282.53°)
OKLab	oklab(33.35% -0.0164 -0.0869)
OKLCH	oklch(33.35% 0.088 259.3)
XYZ	xyz(3.9011, 3.6408, 12.2991)
Luminance	0.0364 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183563 #634618

analogous

#185B63 #183563 #211863

triadic

#183563 #631835 #356318

tetradic

#183563 #63185B #634618 #186321

square

#183563 #63185B #634618 #186321

split-complementary

#183563 #632118 #5B6318

monochromatic

#060D19 #0C1B32 #183563 #244F94 #306AC6

Accessibility & contrast

On white

12.15

#183563 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#183563 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183563

12.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183563	#FFFFFF	#000000	##FFFFFF
##183563	1.00	12.15	1.73	12.15
#FFFFFF	12.15	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E3965

Deuteranopia (green-blind)

#113262

Tritanopia (blue-blind)

#004047

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #183563;
/* rgb */ color: rgb(24, 53, 99);
/* oklch */ color: oklch(33.3% 0.088 259.3);

Tailwind

colors: {
  custom: {
    50: '#606b90',
    500: '#183563',
    950: '#000000',
  },
}

SCSS

$custom: #183563;
$custom-light: #606b90;
$custom-dark: #000000;

JSON

{
  "hex": "#183563",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 99
  },
  "hsl": {
    "h": 216.8,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.33348,
    "c": 0.08846,
    "h": 259.3
  },
  "luminance": 0.03641
}

Semantic roles & 50–950 ramp

primary

#183563

secondary

#99763E

accent

#A644E4

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060C

muted

#797A7D

Preview Lab

Preview with #183563

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

Preview Lab → · Contrast checker → · Palette generator →