#4243BE#4243BE

#4243BE is a mid, vivid blue. Relative luminance 0.089; OKLCH L 46.2% C 0.188 H 275.8°. Best body text is #FFFFFF at 7.56:1 contrast (WCAG AA passes).

Color values

HEX	#4243BE
RGB	rgb(66, 67, 190)
HSL	hsl(240, 49%, 50%)
HSV	hsv(240, 65%, 75%)
CMYK	cmyk(65.3%, 64.7%, 0%, 25.5%)
CIE-LAB	lab(35.77, 38.02, -64.74)
CIE-LCH	lch(35.77, 75.08, 300.43°)
OKLab	oklab(46.19% 0.019 -0.1867)
OKLCH	oklch(46.19% 0.188 275.8)
XYZ	xyz(13.5451, 8.8891, 49.7072)
Luminance	0.0889 (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

#4243BE #BEBD42

analogous

#4281BE #4243BE #7F42BE

triadic

#4243BE #BE4243 #43BE42

tetradic

#4243BE #BE4281 #BEBD42 #42BE7F

square

#4243BE #BE4281 #BEBD42 #42BE7F

split-complementary

#4243BE #BE7F42 #81BE42

monochromatic

#222363 #323391 #4243BE #7070CE #9D9EDD

Accessibility & contrast

On white

7.56

#4243BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#4243BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243BE

7.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243BE	#FFFFFF	#000000	##FFFFFF
##4243BE	1.00	7.56	2.78	7.56
#FFFFFF	7.56	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AC2

Deuteranopia (green-blind)

#004FBC

Tritanopia (blue-blind)

#00637A

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #4243be;
/* rgb */ color: rgb(66, 67, 190);
/* oklch */ color: oklch(46.2% 0.188 275.8);

Tailwind

colors: {
  custom: {
    50: '#8577d3',
    500: '#4243be',
    950: '#000000',
  },
}

SCSS

$custom: #4243be;
$custom-light: #8577d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4243be",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 190
  },
  "hsl": {
    "h": 239.516,
    "s": 48.819,
    "l": 50.196
  },
  "oklch": {
    "l": 0.46193,
    "c": 0.18768,
    "h": 275.8
  },
  "luminance": 0.0889
}

Semantic roles & 50–950 ramp

primary

#4243BE

secondary

#CAC992

accent

#D74FD8

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #4243BE

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

Preview Lab → · Contrast checker → · Palette generator →