#243FBD#243FBD

#243FBD is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.8% C 0.199 H 267.4°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#243FBD
RGB	rgb(36, 63, 189)
HSL	hsl(229, 68%, 44%)
HSV	hsv(229, 81%, 74%)
CMYK	cmyk(81%, 66.7%, 0%, 25.9%)
CIE-LAB	lab(33.14, 36.82, -68.52)
CIE-LCH	lch(33.14, 77.79, 298.25°)
OKLab	oklab(43.82% -0.0091 -0.1985)
OKLCH	oklch(43.82% 0.199 267.4)
XYZ	xyz(11.6872, 7.6028, 48.9858)
Luminance	0.0760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.88

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243FBD #BDA224

analogous

#248CBD #243FBD #5624BD

triadic

#243FBD #BD243F #3FBD24

tetradic

#243FBD #BD248C #BDA224 #24BD56

square

#243FBD #BD248C #BDA224 #24BD56

split-complementary

#243FBD #BD5624 #8CBD24

monochromatic

#101D56 #1A2E8A #243FBD #435EDB #768AE5

Accessibility & contrast

On white

8.33

#243FBD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#243FBD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243FBD

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243FBD	#FFFFFF	#000000	##FFFFFF
##243FBD	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055C1

Deuteranopia (green-blind)

#0047BB

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #243fbd;
/* rgb */ color: rgb(36, 63, 189);
/* oklch */ color: oklch(43.8% 0.199 267.4);

Tailwind

colors: {
  custom: {
    50: '#7a74d2',
    500: '#243fbd',
    950: '#000000',
  },
}

SCSS

$custom: #243fbd;
$custom-light: #7a74d2;
$custom-dark: #000000;

JSON

{
  "hex": "#243fbd",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 189
  },
  "hsl": {
    "h": 229.412,
    "s": 68,
    "l": 44.118
  },
  "oklch": {
    "l": 0.43817,
    "c": 0.19868,
    "h": 267.4
  },
  "luminance": 0.07604
}

Semantic roles & 50–950 ramp

primary

#243FBD

secondary

#CCBC70

accent

#CC3DEB

background

#F8F7FD

surface

#EFEDFA

border

#CAC8D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #243FBD

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

Preview Lab → · Contrast checker → · Palette generator →