#243C81#243C81

#243C81 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.9% C 0.120 H 266.3°. Best body text is #FFFFFF at 10.30:1 contrast (WCAG AA passes).

Color values

HEX	#243C81
RGB	rgb(36, 60, 129)
HSL	hsl(225, 56%, 32%)
HSV	hsv(225, 72%, 51%)
CMYK	cmyk(72.1%, 53.5%, 0%, 49.4%)
CIE-LAB	lab(27.27, 15.88, -41.74)
CIE-LCH	lch(27.27, 44.66, 290.83°)
OKLab	oklab(37.88% -0.0078 -0.1199)
OKLCH	oklch(37.88% 0.12 266.3)
XYZ	xyz(6.3045, 5.1911, 21.4344)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C81 #816924

analogous

#246B81 #243C81 #3A2481

triadic

#243C81 #81243C #3C8124

tetradic

#243C81 #81246B #816924 #24813A

square

#243C81 #81246B #816924 #24813A

split-complementary

#243C81 #813A24 #6B8124

monochromatic

#090F21 #172651 #243C81 #3152B1 #5171CE

Accessibility & contrast

On white

10.30

#243C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#243C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C81

10.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C81	#FFFFFF	#000000	##FFFFFF
##243C81	1.00	10.30	2.04	10.30
#FFFFFF	10.30	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#104583

Deuteranopia (green-blind)

#003C80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #243c81;
/* rgb */ color: rgb(36, 60, 129);
/* oklch */ color: oklch(37.9% 0.120 266.3);

Tailwind

colors: {
  custom: {
    50: '#6b71a6',
    500: '#243c81',
    950: '#000000',
  },
}

SCSS

$custom: #243c81;
$custom-light: #6b71a6;
$custom-dark: #000000;

JSON

{
  "hex": "#243c81",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 129
  },
  "hsl": {
    "h": 224.516,
    "s": 56.364,
    "l": 32.353
  },
  "oklch": {
    "l": 0.37877,
    "c": 0.12019,
    "h": 266.3
  },
  "luminance": 0.05192
}

Semantic roles & 50–950 ramp

primary

#243C81

secondary

#B2994E

accent

#B948E0

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #243C81

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

Preview Lab → · Contrast checker → · Palette generator →