#4243BC#4243BC

#4243BC is a mid, vivid blue. Relative luminance 0.088; OKLCH L 46.0% C 0.185 H 276.0°. Best body text is #FFFFFF at 7.61:1 contrast (WCAG AA passes).

Color values

HEX	#4243BC
RGB	rgb(66, 67, 188)
HSL	hsl(240, 48%, 50%)
HSV	hsv(240, 65%, 74%)
CMYK	cmyk(64.9%, 64.4%, 0%, 26.3%)
CIE-LAB	lab(35.60, 37.35, -63.84)
CIE-LCH	lch(35.60, 73.96, 300.33°)
OKLab	oklab(46.02% 0.0192 -0.1841)
OKLCH	oklch(46.02% 0.185 276)
XYZ	xyz(13.3281, 8.8023, 48.5638)
Luminance	0.0880 (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

#4243BC #BCBB42

analogous

#4280BC #4243BC #7E42BC

triadic

#4243BC #BC4243 #43BC42

tetradic

#4243BC #BC4280 #BCBB42 #42BC7E

square

#4243BC #BC4280 #BCBB42 #42BC7E

split-complementary

#4243BC #BC7E42 #80BC42

monochromatic

#222361 #32338F #4243BC #6F70CC #9C9DDC

Accessibility & contrast

On white

7.61

#4243BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#4243BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243BC

7.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243BC	#FFFFFF	#000000	##FFFFFF
##4243BC	1.00	7.61	2.76	7.61
#FFFFFF	7.61	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059C0

Deuteranopia (green-blind)

#004EBA

Tritanopia (blue-blind)

#006279

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #4243bc;
/* rgb */ color: rgb(66, 67, 188);
/* oklch */ color: oklch(46.0% 0.185 276.0);

Tailwind

colors: {
  custom: {
    50: '#8577d1',
    500: '#4243bc',
    950: '#000000',
  },
}

SCSS

$custom: #4243bc;
$custom-light: #8577d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4243bc",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 188
  },
  "hsl": {
    "h": 239.508,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.46018,
    "c": 0.18508,
    "h": 276
  },
  "luminance": 0.08803
}

Semantic roles & 50–950 ramp

primary

#4243BC

secondary

#C9C891

accent

#D750D8

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #4243BC

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

Preview Lab → · Contrast checker → · Palette generator →