#243C9F#243C9F

#243C9F is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.163 H 267.7°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#243C9F
RGB	rgb(36, 60, 159)
HSL	hsl(228, 63%, 38%)
HSV	hsv(228, 77%, 62%)
CMYK	cmyk(77.4%, 62.3%, 0%, 37.6%)
CIE-LAB	lab(29.69, 27.54, -56.28)
CIE-LCH	lch(29.69, 62.65, 296.08°)
OKLab	oklab(40.44% -0.0064 -0.1627)
OKLCH	oklch(40.44% 0.163 267.7)
XYZ	xyz(8.5992, 6.1090, 33.5201)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C9F #9F8724

analogous

#24799F #243C9F #4A249F

triadic

#243C9F #9F243C #3C9F24

tetradic

#243C9F #9F2479 #9F8724 #249F4A

square

#243C9F #9F2479 #9F8724 #249F4A

split-complementary

#243C9F #9F4A24 #799F24

monochromatic

#0D163B #19296D #243C9F #304FD0 #627ADB

Accessibility & contrast

On white

9.45

#243C9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#243C9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C9F

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C9F	#FFFFFF	#000000	##FFFFFF
##243C9F	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA2

Deuteranopia (green-blind)

#00409D

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #243c9f;
/* rgb */ color: rgb(36, 60, 159);
/* oklch */ color: oklch(40.4% 0.163 267.7);

Tailwind

colors: {
  custom: {
    50: '#7371bc',
    500: '#243c9f',
    950: '#000000',
  },
}

SCSS

$custom: #243c9f;
$custom-light: #7371bc;
$custom-dark: #000000;

JSON

{
  "hex": "#243c9f",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 159
  },
  "hsl": {
    "h": 228.293,
    "s": 63.077,
    "l": 38.235
  },
  "oklch": {
    "l": 0.40443,
    "c": 0.16279,
    "h": 267.7
  },
  "luminance": 0.0611
}

Semantic roles & 50–950 ramp

primary

#243C9F

secondary

#C1AD5E

accent

#C642E6

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243C9F

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

Preview Lab → · Contrast checker → · Palette generator →