#4243C8#4243C8

#4243C8 is a mid, highly saturated blue. Relative luminance 0.093; OKLCH L 47.1% C 0.201 H 275.2°. Best body text is #FFFFFF at 7.32:1 contrast (WCAG AA passes).

Color values

HEX	#4243C8
RGB	rgb(66, 67, 200)
HSL	hsl(240, 55%, 52%)
HSV	hsv(240, 67%, 78%)
CMYK	cmyk(67%, 66.5%, 0%, 21.6%)
CIE-LAB	lab(36.63, 41.37, -69.17)
CIE-LCH	lch(36.63, 80.60, 300.88°)
OKLab	oklab(47.09% 0.0181 -0.1997)
OKLCH	oklch(47.09% 0.201 275.2)
XYZ	xyz(14.6758, 9.3414, 55.6620)
Luminance	0.0934 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.03

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4243C8 #C8C742

analogous

#4286C8 #4243C8 #8442C8

triadic

#4243C8 #C84243 #43C842

tetradic

#4243C8 #C84286 #C8C742 #42C884

square

#4243C8 #C84286 #C8C742 #42C884

split-complementary

#4243C8 #C88442 #86C842

monochromatic

#20216F #2E2F9F #4243C8 #7172D6 #A1A1E4

Accessibility & contrast

On white

7.32

#4243C8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.87

#4243C8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243C8

7.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243C8	#FFFFFF	#000000	##FFFFFF
##4243C8	1.00	7.32	2.87	7.32
#FFFFFF	7.32	1.00	21.00	1.00
#000000	2.87	21.00	1.00	21.00
##FFFFFF	7.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CCC

Deuteranopia (green-blind)

#0050C5

Tritanopia (blue-blind)

#006680

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #4243c8;
/* rgb */ color: rgb(66, 67, 200);
/* oklch */ color: oklch(47.1% 0.201 275.2);

Tailwind

colors: {
  custom: {
    50: '#8778da',
    500: '#4243c8',
    950: '#000000',
  },
}

SCSS

$custom: #4243c8;
$custom-light: #8778da;
$custom-dark: #000000;

JSON

{
  "hex": "#4243c8",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 200
  },
  "hsl": {
    "h": 239.552,
    "s": 54.918,
    "l": 52.157
  },
  "oklch": {
    "l": 0.47087,
    "c": 0.20051,
    "h": 275.2
  },
  "luminance": 0.09343
}

Semantic roles & 50–950 ramp

primary

#4243C8

secondary

#D0D096

accent

#DD4ADE

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #4243C8

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

Preview Lab → · Contrast checker → · Palette generator →