#243F81#243F81

#243F81 is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.5% C 0.116 H 264.8°. Best body text is #FFFFFF at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#243F81
RGB	rgb(36, 63, 129)
HSL	hsl(223, 56%, 32%)
HSV	hsv(223, 72%, 51%)
CMYK	cmyk(72.1%, 51.2%, 0%, 49.4%)
CIE-LAB	lab(28.15, 13.80, -40.32)
CIE-LCH	lch(28.15, 42.61, 288.90°)
OKLab	oklab(38.55% -0.0106 -0.1157)
OKLCH	oklch(38.55% 0.116 264.8)
XYZ	xyz(6.4661, 5.5144, 21.4882)
Luminance	0.0551 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F81 #816624

analogous

#246D81 #243F81 #382481

triadic

#243F81 #81243F #3F8124

tetradic

#243F81 #81246D #816624 #248138

square

#243F81 #81246D #816624 #248138

split-complementary

#243F81 #813824 #6D8124

monochromatic

#091021 #172851 #243F81 #3156B1 #5175CE

Accessibility & contrast

On white

9.99

#243F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#243F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F81

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F81	#FFFFFF	#000000	##FFFFFF
##243F81	1.00	9.99	2.10	9.99
#FFFFFF	9.99	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4783

Deuteranopia (green-blind)

#003E80

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #243f81;
/* rgb */ color: rgb(36, 63, 129);
/* oklch */ color: oklch(38.5% 0.116 264.8);

Tailwind

colors: {
  custom: {
    50: '#6b73a6',
    500: '#243f81',
    950: '#000000',
  },
}

SCSS

$custom: #243f81;
$custom-light: #6b73a6;
$custom-dark: #000000;

JSON

{
  "hex": "#243f81",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 129
  },
  "hsl": {
    "h": 222.581,
    "s": 56.364,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38546,
    "c": 0.1162,
    "h": 264.8
  },
  "luminance": 0.05515
}

Semantic roles & 50–950 ramp

primary

#243F81

secondary

#B2954E

accent

#B448E0

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #243F81

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

Preview Lab → · Contrast checker → · Palette generator →