#243FA1#243FA1

#243FA1 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.2% C 0.162 H 267.0°. Best body text is #FFFFFF at 9.13:1 contrast (WCAG AA passes).

Color values

HEX	#243FA1
RGB	rgb(36, 63, 161)
HSL	hsl(227, 63%, 39%)
HSV	hsv(227, 78%, 63%)
CMYK	cmyk(77.6%, 60.9%, 0%, 36.9%)
CIE-LAB	lab(30.65, 26.29, -55.92)
CIE-LCH	lch(30.65, 61.79, 295.18°)
OKLab	oklab(41.21% -0.0084 -0.1616)
OKLCH	oklch(41.21% 0.162 267)
XYZ	xyz(8.9358, 6.5023, 34.4954)
Luminance	0.0650 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243FA1 #A18624

analogous

#247DA1 #243FA1 #4724A1

triadic

#243FA1 #A1243F #3FA124

tetradic

#243FA1 #A1247D #A18624 #24A147

square

#243FA1 #A1247D #A18624 #24A147

split-complementary

#243FA1 #A14724 #7DA124

monochromatic

#0E183D #192B6F #243FA1 #3154D1 #637DDC

Accessibility & contrast

On white

9.13

#243FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#243FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243FA1

9.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243FA1	#FFFFFF	#000000	##FFFFFF
##243FA1	1.00	9.13	2.30	9.13
#FFFFFF	9.13	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA4

Deuteranopia (green-blind)

#00429F

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #243fa1;
/* rgb */ color: rgb(36, 63, 161);
/* oklch */ color: oklch(41.2% 0.162 267.0);

Tailwind

colors: {
  custom: {
    50: '#7373be',
    500: '#243fa1',
    950: '#000000',
  },
}

SCSS

$custom: #243fa1;
$custom-light: #7373be;
$custom-dark: #000000;

JSON

{
  "hex": "#243fa1",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 161
  },
  "hsl": {
    "h": 227.04,
    "s": 63.452,
    "l": 38.627
  },
  "oklch": {
    "l": 0.4121,
    "c": 0.16179,
    "h": 267
  },
  "luminance": 0.06503
}

Semantic roles & 50–950 ramp

primary

#243FA1

secondary

#C2AC5F

accent

#C341E6

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #243FA1

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

Preview Lab → · Contrast checker → · Palette generator →