#243CA1#243CA1

#243CA1 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.6% C 0.166 H 267.8°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#243CA1
RGB	rgb(36, 60, 161)
HSL	hsl(228, 63%, 39%)
HSV	hsv(228, 78%, 63%)
CMYK	cmyk(77.6%, 62.7%, 0%, 36.9%)
CIE-LAB	lab(29.86, 28.30, -57.20)
CIE-LCH	lch(29.86, 63.82, 296.33°)
OKLab	oklab(40.63% -0.0064 -0.1654)
OKLCH	oklch(40.63% 0.166 267.8)
XYZ	xyz(8.7742, 6.1790, 34.4415)
Luminance	0.0618 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243CA1 #A18924

analogous

#247AA1 #243CA1 #4A24A1

triadic

#243CA1 #A1243C #3CA124

tetradic

#243CA1 #A1247A #A18924 #24A14A

square

#243CA1 #A1247A #A18924 #24A14A

split-complementary

#243CA1 #A14A24 #7AA124

monochromatic

#0E173D #19296F #243CA1 #3150D1 #637ADC

Accessibility & contrast

On white

9.39

#243CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#243CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243CA1

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243CA1	#FFFFFF	#000000	##FFFFFF
##243CA1	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA4

Deuteranopia (green-blind)

#00419F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #243ca1;
/* rgb */ color: rgb(36, 60, 161);
/* oklch */ color: oklch(40.6% 0.166 267.8);

Tailwind

colors: {
  custom: {
    50: '#7371be',
    500: '#243ca1',
    950: '#000000',
  },
}

SCSS

$custom: #243ca1;
$custom-light: #7371be;
$custom-dark: #000000;

JSON

{
  "hex": "#243ca1",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 161
  },
  "hsl": {
    "h": 228.48,
    "s": 63.452,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40626,
    "c": 0.16551,
    "h": 267.8
  },
  "luminance": 0.0618
}

Semantic roles & 50–950 ramp

primary

#243CA1

secondary

#C2AF5F

accent

#C741E6

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243CA1

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

Preview Lab → · Contrast checker → · Palette generator →