#243B9F#243B9F

#243B9F is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.3% C 0.164 H 268.0°. Best body text is #FFFFFF at 9.54:1 contrast (WCAG AA passes).

Color values

HEX	#243B9F
RGB	rgb(36, 59, 159)
HSL	hsl(229, 63%, 38%)
HSV	hsv(229, 77%, 62%)
CMYK	cmyk(77.4%, 62.9%, 0%, 37.6%)
CIE-LAB	lab(29.43, 28.21, -56.70)
CIE-LCH	lch(29.43, 63.33, 296.45°)
OKLab	oklab(40.25% -0.0058 -0.1639)
OKLCH	oklch(40.25% 0.164 268)
XYZ	xyz(8.5474, 6.0053, 33.5028)
Luminance	0.0601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B9F #9F8824

analogous

#24799F #243B9F #4A249F

triadic

#243B9F #9F243B #3B9F24

tetradic

#243B9F #9F2479 #9F8824 #249F4A

square

#243B9F #9F2479 #9F8824 #249F4A

split-complementary

#243B9F #9F4A24 #799F24

monochromatic

#0D163B #19286D #243B9F #304ED0 #6279DB

Accessibility & contrast

On white

9.54

#243B9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#243B9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B9F

9.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B9F	#FFFFFF	#000000	##FFFFFF
##243B9F	1.00	9.54	2.20	9.54
#FFFFFF	9.54	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA2

Deuteranopia (green-blind)

#00409D

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243b9f;
/* rgb */ color: rgb(36, 59, 159);
/* oklch */ color: oklch(40.3% 0.164 268.0);

Tailwind

colors: {
  custom: {
    50: '#7370bc',
    500: '#243b9f',
    950: '#000000',
  },
}

SCSS

$custom: #243b9f;
$custom-light: #7370bc;
$custom-dark: #000000;

JSON

{
  "hex": "#243b9f",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 159
  },
  "hsl": {
    "h": 228.78,
    "s": 63.077,
    "l": 38.235
  },
  "oklch": {
    "l": 0.40251,
    "c": 0.16402,
    "h": 268
  },
  "luminance": 0.06006
}

Semantic roles & 50–950 ramp

primary

#243B9F

secondary

#C1AE5E

accent

#C742E6

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243B9F

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

Preview Lab → · Contrast checker → · Palette generator →