#243F9F#243F9F

#243F9F is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.159 H 267.0°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#243F9F
RGB	rgb(36, 63, 159)
HSL	hsl(227, 63%, 38%)
HSV	hsv(227, 77%, 62%)
CMYK	cmyk(77.4%, 60.4%, 0%, 37.6%)
CIE-LAB	lab(30.48, 25.52, -54.98)
CIE-LCH	lch(30.48, 60.62, 294.90°)
OKLab	oklab(41.03% -0.0085 -0.1588)
OKLCH	oklch(41.03% 0.159 267)
XYZ	xyz(8.7609, 6.4323, 33.5740)
Luminance	0.0643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F9F #9F8424

analogous

#247C9F #243F9F #46249F

triadic

#243F9F #9F243F #3F9F24

tetradic

#243F9F #9F247C #9F8424 #249F46

square

#243F9F #9F247C #9F8424 #249F46

split-complementary

#243F9F #9F4624 #7C9F24

monochromatic

#0D173B #192B6D #243F9F #3053D0 #627DDB

Accessibility & contrast

On white

9.18

#243F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#243F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F9F

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F9F	#FFFFFF	#000000	##FFFFFF
##243F9F	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA2

Deuteranopia (green-blind)

#00429D

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #243f9f;
/* rgb */ color: rgb(36, 63, 159);
/* oklch */ color: oklch(41.0% 0.159 267.0);

Tailwind

colors: {
  custom: {
    50: '#7273bc',
    500: '#243f9f',
    950: '#000000',
  },
}

SCSS

$custom: #243f9f;
$custom-light: #7273bc;
$custom-dark: #000000;

JSON

{
  "hex": "#243f9f",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 159
  },
  "hsl": {
    "h": 226.829,
    "s": 63.077,
    "l": 38.235
  },
  "oklch": {
    "l": 0.41032,
    "c": 0.15906,
    "h": 267
  },
  "luminance": 0.06433
}

Semantic roles & 50–950 ramp

primary

#243F9F

secondary

#C1AB5E

accent

#C242E6

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #243F9F

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

Preview Lab → · Contrast checker → · Palette generator →