#4243C0#4243C0

#4243C0 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 46.4% C 0.190 H 275.7°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#4243C0
RGB	rgb(66, 67, 192)
HSL	hsl(240, 50%, 51%)
HSV	hsv(240, 66%, 75%)
CMYK	cmyk(65.6%, 65.1%, 0%, 24.7%)
CIE-LAB	lab(35.94, 38.69, -65.63)
CIE-LCH	lch(35.94, 76.19, 300.52°)
OKLab	oklab(46.37% 0.0189 -0.1893)
OKLCH	oklch(46.37% 0.19 275.7)
XYZ	xyz(13.7652, 8.9771, 50.8663)
Luminance	0.0898 (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

#4243C0 #C0BF42

analogous

#4282C0 #4243C0 #8042C0

triadic

#4243C0 #C04243 #43C042

tetradic

#4243C0 #C04282 #C0BF42 #42C080

square

#4243C0 #C04282 #C0BF42 #42C080

split-complementary

#4243C0 #C08042 #82C042

monochromatic

#222266 #313294 #4243C0 #7071CF #9E9EDF

Accessibility & contrast

On white

7.51

#4243C0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#4243C0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243C0

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243C0	#FFFFFF	#000000	##FFFFFF
##4243C0	1.00	7.51	2.80	7.51
#FFFFFF	7.51	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AC4

Deuteranopia (green-blind)

#004FBE

Tritanopia (blue-blind)

#00637B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #4243c0;
/* rgb */ color: rgb(66, 67, 192);
/* oklch */ color: oklch(46.4% 0.190 275.7);

Tailwind

colors: {
  custom: {
    50: '#8577d4',
    500: '#4243c0',
    950: '#000000',
  },
}

SCSS

$custom: #4243c0;
$custom-light: #8577d4;
$custom-dark: #000000;

JSON

{
  "hex": "#4243c0",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 192
  },
  "hsl": {
    "h": 239.524,
    "s": 50,
    "l": 50.588
  },
  "oklch": {
    "l": 0.4637,
    "c": 0.19027,
    "h": 275.7
  },
  "luminance": 0.08978
}

Semantic roles & 50–950 ramp

primary

#4243C0

secondary

#CBCA93

accent

#D84EDA

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #4243C0

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

Preview Lab → · Contrast checker → · Palette generator →