#243D99#243D99

#243D99 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.153 H 267.3°. Best body text is #FFFFFF at 9.54:1 contrast (WCAG AA passes).

Color values

HEX	#243D99
RGB	rgb(36, 61, 153)
HSL	hsl(227, 62%, 37%)
HSV	hsv(227, 76%, 60%)
CMYK	cmyk(76.5%, 60.1%, 0%, 40%)
CIE-LAB	lab(29.44, 24.56, -53.03)
CIE-LCH	lch(29.44, 58.44, 294.85°)
OKLab	oklab(40.1% -0.0072 -0.1531)
OKLCH	oklch(40.1% 0.153 267.3)
XYZ	xyz(8.1441, 6.0116, 30.8620)
Luminance	0.0601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243D99 #998024

analogous

#247899 #243D99 #452499

triadic

#243D99 #99243D #3D9924

tetradic

#243D99 #992478 #998024 #249945

square

#243D99 #992478 #998024 #249945

split-complementary

#243D99 #994524 #789924

monochromatic

#0D1536 #182967 #243D99 #3051CB #5E78D9

Accessibility & contrast

On white

9.54

#243D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#243D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243D99

9.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243D99	#FFFFFF	#000000	##FFFFFF
##243D99	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)

#004B9C

Deuteranopia (green-blind)

#004097

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243d99;
/* rgb */ color: rgb(36, 61, 153);
/* oklch */ color: oklch(40.1% 0.153 267.3);

Tailwind

colors: {
  custom: {
    50: '#7172b8',
    500: '#243d99',
    950: '#000000',
  },
}

SCSS

$custom: #243d99;
$custom-light: #7172b8;
$custom-dark: #000000;

JSON

{
  "hex": "#243d99",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 153
  },
  "hsl": {
    "h": 227.179,
    "s": 61.905,
    "l": 37.059
  },
  "oklch": {
    "l": 0.40103,
    "c": 0.15329,
    "h": 267.3
  },
  "luminance": 0.06012
}

Semantic roles & 50–950 ramp

primary

#243D99

secondary

#BEA95B

accent

#C243E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #243D99

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

Preview Lab → · Contrast checker → · Palette generator →