#243C8D#243C8D

#243C8D is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.9% C 0.138 H 267.2°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#243C8D
RGB	rgb(36, 60, 141)
HSL	hsl(226, 59%, 35%)
HSV	hsv(226, 74%, 55%)
CMYK	cmyk(74.5%, 57.4%, 0%, 44.7%)
CIE-LAB	lab(28.19, 20.58, -47.70)
CIE-LCH	lch(28.19, 51.95, 293.34°)
OKLab	oklab(38.86% -0.0068 -0.1375)
OKLCH	oklch(38.86% 0.138 267.2)
XYZ	xyz(7.1495, 5.5291, 25.8846)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C8D #8D7524

analogous

#24708D #243C8D #41248D

triadic

#243C8D #8D243C #3C8D24

tetradic

#243C8D #8D2470 #8D7524 #248D41

square

#243C8D #8D2470 #8D7524 #248D41

split-complementary

#243C8D #8D4124 #708D24

monochromatic

#0B132B #18275C #243C8D #3051BE #5774D4

Accessibility & contrast

On white

9.97

#243C8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#243C8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C8D

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C8D	#FFFFFF	#000000	##FFFFFF
##243C8D	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004890

Deuteranopia (green-blind)

#003E8B

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #243c8d;
/* rgb */ color: rgb(36, 60, 141);
/* oklch */ color: oklch(38.9% 0.138 267.2);

Tailwind

colors: {
  custom: {
    50: '#6e71af',
    500: '#243c8d',
    950: '#000000',
  },
}

SCSS

$custom: #243c8d;
$custom-light: #6e71af;
$custom-dark: #000000;

JSON

{
  "hex": "#243c8d",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 141
  },
  "hsl": {
    "h": 226.286,
    "s": 59.322,
    "l": 34.706
  },
  "oklch": {
    "l": 0.38862,
    "c": 0.13766,
    "h": 267.2
  },
  "luminance": 0.0553
}

Semantic roles & 50–950 ramp

primary

#243C8D

secondary

#B8A254

accent

#BF45E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243C8D

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

Preview Lab → · Contrast checker → · Palette generator →