#243F99#243F99

#243F99 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.151 H 266.7°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#243F99
RGB	rgb(36, 63, 153)
HSL	hsl(226, 62%, 37%)
HSV	hsv(226, 76%, 60%)
CMYK	cmyk(76.5%, 58.8%, 0%, 40%)
CIE-LAB	lab(29.98, 23.20, -52.15)
CIE-LCH	lch(29.98, 57.08, 293.99°)
OKLab	oklab(40.51% -0.0086 -0.1505)
OKLCH	oklch(40.51% 0.151 266.7)
XYZ	xyz(8.2528, 6.2291, 30.8982)
Luminance	0.0623 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F99 #997E24

analogous

#247A99 #243F99 #442499

triadic

#243F99 #99243F #3F9924

tetradic

#243F99 #99247A #997E24 #249944

square

#243F99 #99247A #997E24 #249944

split-complementary

#243F99 #994424 #7A9924

monochromatic

#0D1636 #182B67 #243F99 #3053CB #5E7BD9

Accessibility & contrast

On white

9.35

#243F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#243F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F99

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F99	#FFFFFF	#000000	##FFFFFF
##243F99	1.00	9.35	2.25	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004197

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #243f99;
/* rgb */ color: rgb(36, 63, 153);
/* oklch */ color: oklch(40.5% 0.151 266.7);

Tailwind

colors: {
  custom: {
    50: '#7173b8',
    500: '#243f99',
    950: '#000000',
  },
}

SCSS

$custom: #243f99;
$custom-light: #7173b8;
$custom-dark: #000000;

JSON

{
  "hex": "#243f99",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 153
  },
  "hsl": {
    "h": 226.154,
    "s": 61.905,
    "l": 37.059
  },
  "oklch": {
    "l": 0.40508,
    "c": 0.15075,
    "h": 266.7
  },
  "luminance": 0.0623
}

Semantic roles & 50–950 ramp

primary

#243F99

secondary

#BEA75B

accent

#C043E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #243F99

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

Preview Lab → · Contrast checker → · Palette generator →