#4243C7#4243C7

#4243C7 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 47.0% C 0.199 H 275.2°. Best body text is #FFFFFF at 7.34:1 contrast (WCAG AA passes).

Color values

HEX	#4243C7
RGB	rgb(66, 67, 199)
HSL	hsl(240, 54%, 52%)
HSV	hsv(240, 67%, 78%)
CMYK	cmyk(66.8%, 66.3%, 0%, 22%)
CIE-LAB	lab(36.55, 41.04, -68.73)
CIE-LCH	lch(36.55, 80.05, 300.84°)
OKLab	oklab(47% 0.0182 -0.1984)
OKLCH	oklch(47% 0.199 275.2)
XYZ	xyz(14.5593, 9.2948, 55.0486)
Luminance	0.0930 (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

#4243C7 #C7C642

analogous

#4286C7 #4243C7 #8442C7

triadic

#4243C7 #C74243 #43C742

tetradic

#4243C7 #C74286 #C7C642 #42C784

square

#4243C7 #C74286 #C7C642 #42C784

split-complementary

#4243C7 #C78442 #86C742

monochromatic

#21216E #2F2F9D #4243C7 #7172D5 #A0A1E3

Accessibility & contrast

On white

7.34

#4243C7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#4243C7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243C7

7.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243C7	#FFFFFF	#000000	##FFFFFF
##4243C7	1.00	7.34	2.86	7.34
#FFFFFF	7.34	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CCB

Deuteranopia (green-blind)

#0050C4

Tritanopia (blue-blind)

#00667F

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #4243c7;
/* rgb */ color: rgb(66, 67, 199);
/* oklch */ color: oklch(47.0% 0.199 275.2);

Tailwind

colors: {
  custom: {
    50: '#8778d9',
    500: '#4243c7',
    950: '#000000',
  },
}

SCSS

$custom: #4243c7;
$custom-light: #8778d9;
$custom-dark: #000000;

JSON

{
  "hex": "#4243c7",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 199
  },
  "hsl": {
    "h": 239.549,
    "s": 54.286,
    "l": 51.961
  },
  "oklch": {
    "l": 0.46997,
    "c": 0.19924,
    "h": 275.2
  },
  "luminance": 0.09296
}

Semantic roles & 50–950 ramp

primary

#4243C7

secondary

#D0CF95

accent

#DD4ADE

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #4243C7

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

Preview Lab → · Contrast checker → · Palette generator →