#243B99#243B99

#243B99 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.7% C 0.156 H 267.9°. Best body text is #FFFFFF at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#243B99
RGB	rgb(36, 59, 153)
HSL	hsl(228, 62%, 37%)
HSV	hsv(228, 76%, 60%)
CMYK	cmyk(76.5%, 61.4%, 0%, 40%)
CIE-LAB	lab(28.91, 25.91, -53.90)
CIE-LCH	lch(28.91, 59.81, 295.68°)
OKLab	oklab(39.71% -0.0057 -0.1557)
OKLCH	oklch(39.71% 0.156 267.9)
XYZ	xyz(8.0393, 5.8020, 30.8270)
Luminance	0.0580 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B99 #998224

analogous

#247699 #243B99 #482499

triadic

#243B99 #99243B #3B9924

tetradic

#243B99 #992476 #998224 #249948

square

#243B99 #992476 #998224 #249948

split-complementary

#243B99 #994824 #769924

monochromatic

#0D1536 #182867 #243B99 #304ECB #5E76D9

Accessibility & contrast

On white

9.72

#243B99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#243B99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B99

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B99	#FFFFFF	#000000	##FFFFFF
##243B99	1.00	9.72	2.16	9.72
#FFFFFF	9.72	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9C

Deuteranopia (green-blind)

#003F97

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #243b99;
/* rgb */ color: rgb(36, 59, 153);
/* oklch */ color: oklch(39.7% 0.156 267.9);

Tailwind

colors: {
  custom: {
    50: '#7170b8',
    500: '#243b99',
    950: '#000000',
  },
}

SCSS

$custom: #243b99;
$custom-light: #7170b8;
$custom-dark: #000000;

JSON

{
  "hex": "#243b99",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 153
  },
  "hsl": {
    "h": 228.205,
    "s": 61.905,
    "l": 37.059
  },
  "oklch": {
    "l": 0.39706,
    "c": 0.15582,
    "h": 267.9
  },
  "luminance": 0.05803
}

Semantic roles & 50–950 ramp

primary

#243B99

secondary

#BEAB5B

accent

#C543E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #243B99

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

Preview Lab → · Contrast checker → · Palette generator →