#6B66CC#6B66CC

#6B66CC is a mid, vivid blue. Relative luminance 0.170; OKLCH L 56.5% C 0.153 H 282.5°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#6B66CC
RGB	rgb(107, 102, 204)
HSL	hsl(243, 50%, 60%)
HSV	hsv(243, 50%, 80%)
CMYK	cmyk(47.5%, 50%, 0%, 20%)
CIE-LAB	lab(48.24, 28.73, -52.52)
CIE-LCH	lch(48.24, 59.86, 298.68°)
OKLab	oklab(56.53% 0.0332 -0.1494)
OKLCH	oklch(56.53% 0.153 282.5)
XYZ	xyz(21.7106, 16.9871, 59.2499)
Luminance	0.1699 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6B66CC #C7CC66

analogous

#6694CC #6B66CC #9E66CC

triadic

#6B66CC #CC6B66 #66CC6B

tetradic

#6B66CC #CC6694 #C7CC66 #66CC9E

square

#6B66CC #CC6694 #C7CC66 #66CC9E

split-complementary

#6B66CC #CC9E66 #94CC66

monochromatic

#322E8A #433DB8 #6B66CC #9794DB #C4C2EB

Accessibility & contrast

On white

4.78

#6B66CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#6B66CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6B66CC

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6B66CC	#FFFFFF	#000000	##FFFFFF
##6B66CC	1.00	4.78	4.40	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3776D0

Deuteranopia (green-blind)

#316FCA

Tritanopia (blue-blind)

#497C8F

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #6b66cc;
/* rgb */ color: rgb(107, 102, 204);
/* oklch */ color: oklch(56.5% 0.153 282.5);

Tailwind

colors: {
  custom: {
    50: '#9b91dc',
    500: '#6b66cc',
    950: '#000000',
  },
}

SCSS

$custom: #6b66cc;
$custom-light: #9b91dc;
$custom-dark: #000000;

JSON

{
  "hex": "#6b66cc",
  "rgb": {
    "r": 107,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 242.941,
    "s": 50,
    "l": 60
  },
  "oklch": {
    "l": 0.56525,
    "c": 0.15308,
    "h": 282.5
  },
  "luminance": 0.16988
}

Semantic roles & 50–950 ramp

primary

#6B66CC

secondary

#D9DBB3

accent

#DA4ED3

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0F0D15

muted

#7E7D83

Preview Lab

Preview with #6B66CC

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

Preview Lab → · Contrast checker → · Palette generator →