#243C99#243C99

#243C99 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.9% C 0.155 H 267.6°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#243C99
RGB	rgb(36, 60, 153)
HSL	hsl(228, 62%, 37%)
HSV	hsv(228, 76%, 60%)
CMYK	cmyk(76.5%, 60.8%, 0%, 40%)
CIE-LAB	lab(29.17, 25.24, -53.47)
CIE-LCH	lch(29.17, 59.12, 295.27°)
OKLab	oklab(39.9% -0.0064 -0.1544)
OKLCH	oklch(39.9% 0.155 267.6)
XYZ	xyz(8.0912, 5.9058, 30.8443)
Luminance	0.0591 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C99 #998124

analogous

#247799 #243C99 #462499

triadic

#243C99 #99243C #3C9924

tetradic

#243C99 #992477 #998124 #249946

square

#243C99 #992477 #998124 #249946

split-complementary

#243C99 #994624 #779924

monochromatic

#0D1536 #182967 #243C99 #304FCB #5E77D9

Accessibility & contrast

On white

9.63

#243C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#243C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C99

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C99	#FFFFFF	#000000	##FFFFFF
##243C99	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9C

Deuteranopia (green-blind)

#003F97

Tritanopia (blue-blind)

#005464

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243c99;
/* rgb */ color: rgb(36, 60, 153);
/* oklch */ color: oklch(39.9% 0.155 267.6);

Tailwind

colors: {
  custom: {
    50: '#7171b8',
    500: '#243c99',
    950: '#000000',
  },
}

SCSS

$custom: #243c99;
$custom-light: #7171b8;
$custom-dark: #000000;

JSON

{
  "hex": "#243c99",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 153
  },
  "hsl": {
    "h": 227.692,
    "s": 61.905,
    "l": 37.059
  },
  "oklch": {
    "l": 0.39904,
    "c": 0.15455,
    "h": 267.6
  },
  "luminance": 0.05907
}

Semantic roles & 50–950 ramp

primary

#243C99

secondary

#BEAA5B

accent

#C443E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #243C99

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

Preview Lab → · Contrast checker → · Palette generator →