#4243C1#4243C1

#4243C1 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 46.5% C 0.192 H 275.6°. Best body text is #FFFFFF at 7.49:1 contrast (WCAG AA passes).

Color values

HEX	#4243C1
RGB	rgb(66, 67, 193)
HSL	hsl(240, 51%, 51%)
HSV	hsv(240, 66%, 76%)
CMYK	cmyk(65.8%, 65.3%, 0%, 24.3%)
CIE-LAB	lab(36.03, 39.03, -66.08)
CIE-LCH	lch(36.03, 76.75, 300.57°)
OKLab	oklab(46.46% 0.0188 -0.1906)
OKLCH	oklch(46.46% 0.192 275.6)
XYZ	xyz(13.8764, 9.0216, 51.4518)
Luminance	0.0902 (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

#4243C1 #C1C042

analogous

#4282C1 #4243C1 #8142C1

triadic

#4243C1 #C14243 #43C142

tetradic

#4243C1 #C14282 #C1C042 #42C181

square

#4243C1 #C14282 #C1C042 #42C181

split-complementary

#4243C1 #C18142 #82C142

monochromatic

#222267 #313295 #4243C1 #7071D0 #9E9FDF

Accessibility & contrast

On white

7.49

#4243C1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#4243C1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243C1

7.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243C1	#FFFFFF	#000000	##FFFFFF
##4243C1	1.00	7.49	2.80	7.49
#FFFFFF	7.49	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AC5

Deuteranopia (green-blind)

#004FBF

Tritanopia (blue-blind)

#00647C

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #4243c1;
/* rgb */ color: rgb(66, 67, 193);
/* oklch */ color: oklch(46.5% 0.192 275.6);

Tailwind

colors: {
  custom: {
    50: '#8677d5',
    500: '#4243c1',
    950: '#000000',
  },
}

SCSS

$custom: #4243c1;
$custom-light: #8677d5;
$custom-dark: #000000;

JSON

{
  "hex": "#4243c1",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 193
  },
  "hsl": {
    "h": 239.528,
    "s": 50.598,
    "l": 50.784
  },
  "oklch": {
    "l": 0.46459,
    "c": 0.19156,
    "h": 275.6
  },
  "luminance": 0.09023
}

Semantic roles & 50–950 ramp

primary

#4243C1

secondary

#CCCB93

accent

#D94EDA

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #4243C1

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

Preview Lab → · Contrast checker → · Palette generator →