#243B9D#243B9D

#243B9D is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.1% C 0.161 H 268.0°. Best body text is #FFFFFF at 9.60:1 contrast (WCAG AA passes).

Color values

HEX	#243B9D
RGB	rgb(36, 59, 157)
HSL	hsl(229, 63%, 38%)
HSV	hsv(229, 77%, 62%)
CMYK	cmyk(77.1%, 62.4%, 0%, 38.4%)
CIE-LAB	lab(29.25, 27.45, -55.77)
CIE-LCH	lch(29.25, 62.16, 296.20°)
OKLab	oklab(40.07% -0.0057 -0.1612)
OKLCH	oklch(40.07% 0.161 268)
XYZ	xyz(8.3752, 5.9364, 32.5962)
Luminance	0.0594 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B9D #9D8624

analogous

#24779D #243B9D #49249D

triadic

#243B9D #9D243B #3B9D24

tetradic

#243B9D #9D2477 #9D8624 #249D49

square

#243B9D #9D2477 #9D8624 #249D49

split-complementary

#243B9D #9D4924 #779D24

monochromatic

#0D1639 #19286B #243B9D #2F4ECF #6178DB

Accessibility & contrast

On white

9.60

#243B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#243B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B9D

9.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B9D	#FFFFFF	#000000	##FFFFFF
##243B9D	1.00	9.60	2.19	9.60
#FFFFFF	9.60	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA0

Deuteranopia (green-blind)

#003F9B

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243b9d;
/* rgb */ color: rgb(36, 59, 157);
/* oklch */ color: oklch(40.1% 0.161 268.0);

Tailwind

colors: {
  custom: {
    50: '#7270bb',
    500: '#243b9d',
    950: '#000000',
  },
}

SCSS

$custom: #243b9d;
$custom-light: #7270bb;
$custom-dark: #000000;

JSON

{
  "hex": "#243b9d",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 157
  },
  "hsl": {
    "h": 228.595,
    "s": 62.694,
    "l": 37.843
  },
  "oklch": {
    "l": 0.40068,
    "c": 0.1613,
    "h": 268
  },
  "luminance": 0.05937
}

Semantic roles & 50–950 ramp

primary

#243B9D

secondary

#C0AD5D

accent

#C742E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243B9D

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

Preview Lab → · Contrast checker → · Palette generator →