#6663BB#6663BB

#6663BB is a mid, vivid blue. Relative luminance 0.153; OKLCH L 54.5% C 0.134 H 282.5°. Best body text is #FFFFFF at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#6663BB
RGB	rgb(102, 99, 187)
HSL	hsl(242, 39%, 56%)
HSV	hsv(242, 47%, 73%)
CMYK	cmyk(45.5%, 47.1%, 0%, 26.7%)
CIE-LAB	lab(46.09, 24.25, -46.18)
CIE-LCH	lch(46.09, 52.16, 297.71°)
OKLab	oklab(54.48% 0.0291 -0.131)
OKLCH	oklch(54.48% 0.134 282.5)
XYZ	xyz(18.9083, 15.3354, 48.9678)
Luminance	0.1534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6663BB #B8BB63

analogous

#638CBB #6663BB #9263BB

triadic

#6663BB #BB6663 #63BB66

tetradic

#6663BB #BB638C #B8BB63 #63BB92

square

#6663BB #BB638C #B8BB63 #63BB92

split-complementary

#6663BB #BB9263 #8CBB63

monochromatic

#343272 #47449D #6663BB #908ECE #BAB8E0

Accessibility & contrast

On white

5.16

#6663BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.07

#6663BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6663BB

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6663BB	#FFFFFF	#000000	##FFFFFF
##6663BB	1.00	5.16	4.07	5.16
#FFFFFF	5.16	1.00	21.00	1.00
#000000	4.07	21.00	1.00	21.00
##FFFFFF	5.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F70BE

Deuteranopia (green-blind)

#3A6AB9

Tritanopia (blue-blind)

#4A7586

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #6663bb;
/* rgb */ color: rgb(102, 99, 187);
/* oklch */ color: oklch(54.5% 0.134 282.5);

Tailwind

colors: {
  custom: {
    50: '#968fd0',
    500: '#6663bb',
    950: '#000000',
  },
}

SCSS

$custom: #6663bb;
$custom-light: #968fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#6663bb",
  "rgb": {
    "r": 102,
    "g": 99,
    "b": 187
  },
  "hsl": {
    "h": 242.045,
    "s": 39.286,
    "l": 56.078
  },
  "oklch": {
    "l": 0.5448,
    "c": 0.13416,
    "h": 282.5
  },
  "luminance": 0.15336
}

Semantic roles & 50–950 ramp

primary

#6663BB

secondary

#CECFAB

accent

#CF59CB

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0C14

muted

#7E7D82

Preview Lab

Preview with #6663BB

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

Preview Lab → · Contrast checker → · Palette generator →