#243C9A#243C9A

#243C9A is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.0% C 0.156 H 267.6°. Best body text is #FFFFFF at 9.60:1 contrast (WCAG AA passes).

Color values

HEX	#243C9A
RGB	rgb(36, 60, 154)
HSL	hsl(228, 62%, 37%)
HSV	hsv(228, 77%, 60%)
CMYK	cmyk(76.6%, 61%, 0%, 39.6%)
CIE-LAB	lab(29.26, 25.62, -53.94)
CIE-LCH	lch(29.26, 59.71, 295.41°)
OKLab	oklab(39.99% -0.0064 -0.1558)
OKLCH	oklch(39.99% 0.156 267.6)
XYZ	xyz(8.1741, 5.9390, 31.2811)
Luminance	0.0594 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C9A #9A8224

analogous

#24779A #243C9A #47249A

triadic

#243C9A #9A243C #3C9A24

tetradic

#243C9A #9A2477 #9A8224 #249A47

square

#243C9A #9A2477 #9A8224 #249A47

split-complementary

#243C9A #9A4724 #779A24

monochromatic

#0D1537 #182968 #243C9A #304FCC #5F78DA

Accessibility & contrast

On white

9.60

#243C9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#243C9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C9A

9.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C9A	#FFFFFF	#000000	##FFFFFF
##243C9A	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)

#004B9D

Deuteranopia (green-blind)

#004098

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243c9a;
/* rgb */ color: rgb(36, 60, 154);
/* oklch */ color: oklch(40.0% 0.156 267.6);

Tailwind

colors: {
  custom: {
    50: '#7171b9',
    500: '#243c9a',
    950: '#000000',
  },
}

SCSS

$custom: #243c9a;
$custom-light: #7171b9;
$custom-dark: #000000;

JSON

{
  "hex": "#243c9a",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 154
  },
  "hsl": {
    "h": 227.797,
    "s": 62.105,
    "l": 37.255
  },
  "oklch": {
    "l": 0.39993,
    "c": 0.15593,
    "h": 267.6
  },
  "luminance": 0.0594
}

Semantic roles & 50–950 ramp

primary

#243C9A

secondary

#BFAA5B

accent

#C443E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #243C9A

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

Preview Lab → · Contrast checker → · Palette generator →