#243B9E#243B9E

#243B9E is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.2% C 0.163 H 268.0°. Best body text is #FFFFFF at 9.57:1 contrast (WCAG AA passes).

Color values

HEX	#243B9E
RGB	rgb(36, 59, 158)
HSL	hsl(229, 63%, 38%)
HSV	hsv(229, 77%, 62%)
CMYK	cmyk(77.2%, 62.7%, 0%, 38%)
CIE-LAB	lab(29.34, 27.83, -56.24)
CIE-LCH	lch(29.34, 62.75, 296.33°)
OKLab	oklab(40.16% -0.0058 -0.1626)
OKLCH	oklch(40.16% 0.163 268)
XYZ	xyz(8.4609, 5.9707, 33.0477)
Luminance	0.0597 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B9E #9E8724

analogous

#24789E #243B9E #4A249E

triadic

#243B9E #9E243B #3B9E24

tetradic

#243B9E #9E2478 #9E8724 #249E4A

square

#243B9E #9E2478 #9E8724 #249E4A

split-complementary

#243B9E #9E4A24 #789E24

monochromatic

#0D163A #19286C #243B9E #2F4ED0 #6178DB

Accessibility & contrast

On white

9.57

#243B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#243B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B9E

9.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B9E	#FFFFFF	#000000	##FFFFFF
##243B9E	1.00	9.57	2.19	9.57
#FFFFFF	9.57	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA1

Deuteranopia (green-blind)

#00409C

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243b9e;
/* rgb */ color: rgb(36, 59, 158);
/* oklch */ color: oklch(40.2% 0.163 268.0);

Tailwind

colors: {
  custom: {
    50: '#7270bc',
    500: '#243b9e',
    950: '#000000',
  },
}

SCSS

$custom: #243b9e;
$custom-light: #7270bc;
$custom-dark: #000000;

JSON

{
  "hex": "#243b9e",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 158
  },
  "hsl": {
    "h": 228.689,
    "s": 62.887,
    "l": 38.039
  },
  "oklch": {
    "l": 0.40159,
    "c": 0.16266,
    "h": 268
  },
  "luminance": 0.05972
}

Semantic roles & 50–950 ramp

primary

#243B9E

secondary

#C0AE5E

accent

#C742E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243B9E

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

Preview Lab → · Contrast checker → · Palette generator →