#4243BA#4243BA

#4243BA is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.8% C 0.182 H 276.1°. Best body text is #FFFFFF at 7.65:1 contrast (WCAG AA passes).

Color values

HEX	#4243BA
RGB	rgb(66, 67, 186)
HSL	hsl(240, 48%, 49%)
HSV	hsv(240, 65%, 73%)
CMYK	cmyk(64.5%, 64%, 0%, 27.1%)
CIE-LAB	lab(35.43, 36.67, -62.94)
CIE-LCH	lch(35.43, 72.84, 300.23°)
OKLab	oklab(45.84% 0.0193 -0.1814)
OKLCH	oklch(45.84% 0.182 276.1)
XYZ	xyz(13.1140, 8.7166, 47.4363)
Luminance	0.0872 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4243BA #BAB942

analogous

#427FBA #4243BA #7D42BA

triadic

#4243BA #BA4243 #43BA42

tetradic

#4243BA #BA427F #BAB942 #42BA7D

square

#4243BA #BA427F #BAB942 #42BA7D

split-complementary

#4243BA #BA7D42 #7FBA42

monochromatic

#222260 #32338D #4243BA #6E6FCB #9B9BDB

Accessibility & contrast

On white

7.65

#4243BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#4243BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243BA

7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243BA	#FFFFFF	#000000	##FFFFFF
##4243BA	1.00	7.65	2.74	7.65
#FFFFFF	7.65	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BE

Deuteranopia (green-blind)

#004EB8

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #4243ba;
/* rgb */ color: rgb(66, 67, 186);
/* oklch */ color: oklch(45.8% 0.182 276.1);

Tailwind

colors: {
  custom: {
    50: '#8477d0',
    500: '#4243ba',
    950: '#000000',
  },
}

SCSS

$custom: #4243ba;
$custom-light: #8477d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4243ba",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 186
  },
  "hsl": {
    "h": 239.5,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.45843,
    "c": 0.18246,
    "h": 276.1
  },
  "luminance": 0.08718
}

Semantic roles & 50–950 ramp

primary

#4243BA

secondary

#C8C790

accent

#D651D7

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #4243BA

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

Preview Lab → · Contrast checker → · Palette generator →