#243A9E#243A9E

#243A9E is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.0% C 0.164 H 268.2°. Best body text is #FFFFFF at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#243A9E
RGB	rgb(36, 58, 158)
HSL	hsl(229, 63%, 38%)
HSV	hsv(229, 77%, 62%)
CMYK	cmyk(77.2%, 63.3%, 0%, 38%)
CIE-LAB	lab(29.08, 28.50, -56.66)
CIE-LCH	lch(29.08, 63.42, 296.70°)
OKLab	oklab(39.97% -0.0051 -0.1638)
OKLCH	oklch(39.97% 0.164 268.2)
XYZ	xyz(8.4100, 5.8689, 33.0307)
Luminance	0.0587 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243A9E #9E8824

analogous

#24779E #243A9E #4B249E

triadic

#243A9E #9E243A #3A9E24

tetradic

#243A9E #9E2477 #9E8824 #249E4B

square

#243A9E #9E2477 #9E8824 #249E4B

split-complementary

#243A9E #9E4B24 #779E24

monochromatic

#0D153A #19286C #243A9E #2F4CD0 #6177DB

Accessibility & contrast

On white

9.66

#243A9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#243A9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243A9E

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243A9E	#FFFFFF	#000000	##FFFFFF
##243A9E	1.00	9.66	2.17	9.66
#FFFFFF	9.66	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA1

Deuteranopia (green-blind)

#003F9C

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243a9e;
/* rgb */ color: rgb(36, 58, 158);
/* oklch */ color: oklch(40.0% 0.164 268.2);

Tailwind

colors: {
  custom: {
    50: '#7370bc',
    500: '#243a9e',
    950: '#000000',
  },
}

SCSS

$custom: #243a9e;
$custom-light: #7370bc;
$custom-dark: #000000;

JSON

{
  "hex": "#243a9e",
  "rgb": {
    "r": 36,
    "g": 58,
    "b": 158
  },
  "hsl": {
    "h": 229.18,
    "s": 62.887,
    "l": 38.039
  },
  "oklch": {
    "l": 0.39967,
    "c": 0.16389,
    "h": 268.2
  },
  "luminance": 0.0587
}

Semantic roles & 50–950 ramp

primary

#243A9E

secondary

#C0AE5E

accent

#C842E6

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243A9E

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

Preview Lab → · Contrast checker → · Palette generator →