#243F9E#243F9E

#243F9E is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.9% C 0.158 H 266.9°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#243F9E
RGB	rgb(36, 63, 158)
HSL	hsl(227, 63%, 38%)
HSV	hsv(227, 77%, 62%)
CMYK	cmyk(77.2%, 60.1%, 0%, 38%)
CIE-LAB	lab(30.39, 25.14, -54.51)
CIE-LCH	lch(30.39, 60.03, 294.76°)
OKLab	oklab(40.94% -0.0085 -0.1574)
OKLCH	oklch(40.94% 0.158 266.9)
XYZ	xyz(8.6745, 6.3977, 33.1188)
Luminance	0.0640 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F9E #9E8324

analogous

#247C9E #243F9E #46249E

triadic

#243F9E #9E243F #3F9E24

tetradic

#243F9E #9E247C #9E8324 #249E46

square

#243F9E #9E247C #9E8324 #249E46

split-complementary

#243F9E #9E4624 #7C9E24

monochromatic

#0D173A #192B6C #243F9E #2F53D0 #617CDB

Accessibility & contrast

On white

9.21

#243F9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#243F9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F9E

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F9E	#FFFFFF	#000000	##FFFFFF
##243F9E	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA1

Deuteranopia (green-blind)

#00429C

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #243f9e;
/* rgb */ color: rgb(36, 63, 158);
/* oklch */ color: oklch(40.9% 0.158 266.9);

Tailwind

colors: {
  custom: {
    50: '#7273bb',
    500: '#243f9e',
    950: '#000000',
  },
}

SCSS

$custom: #243f9e;
$custom-light: #7273bb;
$custom-dark: #000000;

JSON

{
  "hex": "#243f9e",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 158
  },
  "hsl": {
    "h": 226.721,
    "s": 62.887,
    "l": 38.039
  },
  "oklch": {
    "l": 0.40944,
    "c": 0.15768,
    "h": 266.9
  },
  "luminance": 0.06399
}

Semantic roles & 50–950 ramp

primary

#243F9E

secondary

#C0AA5E

accent

#C242E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #243F9E

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

Preview Lab → · Contrast checker → · Palette generator →