#243B79#243B79

#243B79 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.0% C 0.110 H 265.9°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#243B79
RGB	rgb(36, 59, 121)
HSL	hsl(224, 54%, 31%)
HSV	hsv(224, 70%, 47%)
CMYK	cmyk(70.2%, 51.2%, 0%, 52.5%)
CIE-LAB	lab(26.40, 13.43, -38.12)
CIE-LCH	lch(26.40, 40.42, 289.41°)
OKLab	oklab(37.03% -0.0078 -0.1093)
OKLCH	oklch(37.03% 0.11 265.9)
XYZ	xyz(5.7415, 4.8829, 18.7254)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B79 #796224

analogous

#246579 #243B79 #372479

triadic

#243B79 #79243B #3B7924

tetradic

#243B79 #792465 #796224 #247937

square

#243B79 #792465 #796224 #247937

split-complementary

#243B79 #793724 #657924

monochromatic

#080D1B #16244A #243B79 #3252A8 #4D6FCA

Accessibility & contrast

On white

10.62

#243B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#243B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B79

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B79	#FFFFFF	#000000	##FFFFFF
##243B79	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19437B

Deuteranopia (green-blind)

#023B78

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #243b79;
/* rgb */ color: rgb(36, 59, 121);
/* oklch */ color: oklch(37.0% 0.110 265.9);

Tailwind

colors: {
  custom: {
    50: '#6a70a0',
    500: '#243b79',
    950: '#000000',
  },
}

SCSS

$custom: #243b79;
$custom-light: #6a70a0;
$custom-dark: #000000;

JSON

{
  "hex": "#243b79",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 121
  },
  "hsl": {
    "h": 223.765,
    "s": 54.14,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37028,
    "c": 0.10959,
    "h": 265.9
  },
  "luminance": 0.04883
}

Semantic roles & 50–950 ramp

primary

#243B79

secondary

#AC924D

accent

#B64ADE

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #243B79

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

Preview Lab → · Contrast checker → · Palette generator →