#243F78#243F78

#243F78 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.9% C 0.103 H 263.3°. Best body text is #FFFFFF at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#243F78
RGB	rgb(36, 63, 120)
HSL	hsl(221, 54%, 31%)
HSV	hsv(221, 70%, 47%)
CMYK	cmyk(70%, 47.5%, 0%, 52.9%)
CIE-LAB	lab(27.53, 10.26, -35.67)
CIE-LCH	lch(27.53, 37.11, 286.05°)
OKLab	oklab(37.87% -0.012 -0.102)
OKLCH	oklch(37.87% 0.103 263.3)
XYZ	xyz(5.8940, 5.2856, 18.4753)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F78 #785D24

analogous

#246978 #243F78 #332478

triadic

#243F78 #78243F #3F7824

tetradic

#243F78 #782469 #785D24 #247833

square

#243F78 #782469 #785D24 #247833

split-complementary

#243F78 #783324 #697824

monochromatic

#080E1A #162649 #243F78 #3258A7 #4D75CA

Accessibility & contrast

On white

10.21

#243F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#243F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F78

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F78	#FFFFFF	#000000	##FFFFFF
##243F78	1.00	10.21	2.06	10.21
#FFFFFF	10.21	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23457A

Deuteranopia (green-blind)

#133D77

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243f78;
/* rgb */ color: rgb(36, 63, 120);
/* oklch */ color: oklch(37.9% 0.103 263.3);

Tailwind

colors: {
  custom: {
    50: '#69739f',
    500: '#243f78',
    950: '#000000',
  },
}

SCSS

$custom: #243f78;
$custom-light: #69739f;
$custom-dark: #000000;

JSON

{
  "hex": "#243f78",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 120
  },
  "hsl": {
    "h": 220.714,
    "s": 53.846,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37873,
    "c": 0.10274,
    "h": 263.3
  },
  "luminance": 0.05286
}

Semantic roles & 50–950 ramp

primary

#243F78

secondary

#AB8D4D

accent

#AE4BDD

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #243F78

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

Preview Lab → · Contrast checker → · Palette generator →