#243C8E#243C8E

#243C8E is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.139 H 267.2°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#243C8E
RGB	rgb(36, 60, 142)
HSL	hsl(226, 60%, 35%)
HSV	hsv(226, 75%, 56%)
CMYK	cmyk(74.6%, 57.7%, 0%, 44.3%)
CIE-LAB	lab(28.27, 20.97, -48.19)
CIE-LCH	lch(28.27, 52.56, 293.52°)
OKLab	oklab(38.95% -0.0068 -0.1389)
OKLCH	oklch(38.95% 0.139 267.2)
XYZ	xyz(7.2242, 5.5590, 26.2782)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C8E #8E7624

analogous

#24718E #243C8E #41248E

triadic

#243C8E #8E243C #3C8E24

tetradic

#243C8E #8E2471 #8E7624 #248E41

square

#243C8E #8E2471 #8E7624 #248E41

split-complementary

#243C8E #8E4124 #718E24

monochromatic

#0B132C #18275D #243C8E #3051BF #5874D5

Accessibility & contrast

On white

9.94

#243C8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#243C8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C8E

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C8E	#FFFFFF	#000000	##FFFFFF
##243C8E	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004891

Deuteranopia (green-blind)

#003E8C

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #243c8e;
/* rgb */ color: rgb(36, 60, 142);
/* oklch */ color: oklch(38.9% 0.139 267.2);

Tailwind

colors: {
  custom: {
    50: '#6e71b0',
    500: '#243c8e',
    950: '#000000',
  },
}

SCSS

$custom: #243c8e;
$custom-light: #6e71b0;
$custom-dark: #000000;

JSON

{
  "hex": "#243c8e",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 142
  },
  "hsl": {
    "h": 226.415,
    "s": 59.551,
    "l": 34.902
  },
  "oklch": {
    "l": 0.38947,
    "c": 0.13909,
    "h": 267.2
  },
  "luminance": 0.0556
}

Semantic roles & 50–950 ramp

primary

#243C8E

secondary

#B9A255

accent

#BF45E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243C8E

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

Preview Lab → · Contrast checker → · Palette generator →