#666ACE#666ACE

#666ACE is a mid, vivid blue. Relative luminance 0.176; OKLCH L 57.0% C 0.151 H 278.7°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#666ACE
RGB	rgb(102, 106, 206)
HSL	hsl(238, 51%, 60%)
HSV	hsv(238, 50%, 81%)
CMYK	cmyk(50.5%, 48.5%, 0%, 19.2%)
CIE-LAB	lab(48.99, 25.79, -52.48)
CIE-LCH	lch(48.99, 58.48, 296.17°)
OKLab	oklab(57.03% 0.0229 -0.1494)
OKLCH	oklch(57.03% 0.151 278.7)
XYZ	xyz(21.7706, 17.5878, 60.6282)
Luminance	0.1759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666ACE #CECA66

analogous

#669ECE #666ACE #9666CE

triadic

#666ACE #CE666A #6ACE66

tetradic

#666ACE #CE669E #CECA66 #66CE96

square

#666ACE #CE669E #CECA66 #66CE96

split-complementary

#666ACE #CE9666 #9ECE66

monochromatic

#2D318D #3C41BB #666ACE #9497DD #C3C4EC

Accessibility & contrast

On white

4.65

#666ACE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#666ACE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666ACE

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666ACE	#FFFFFF	#000000	##FFFFFF
##666ACE	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C79D2

Deuteranopia (green-blind)

#3270CC

Tritanopia (blue-blind)

#3C8092

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666ace;
/* rgb */ color: rgb(102, 106, 206);
/* oklch */ color: oklch(57.0% 0.151 278.7);

Tailwind

colors: {
  custom: {
    50: '#9894dd',
    500: '#666ace',
    950: '#000000',
  },
}

SCSS

$custom: #666ace;
$custom-light: #9894dd;
$custom-dark: #000000;

JSON

{
  "hex": "#666ace",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 206
  },
  "hsl": {
    "h": 237.692,
    "s": 51.485,
    "l": 60.392
  },
  "oklch": {
    "l": 0.57033,
    "c": 0.15118,
    "h": 278.7
  },
  "luminance": 0.17589
}

Semantic roles & 50–950 ramp

primary

#666ACE

secondary

#DCDAB4

accent

#B927BF

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666ACE

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

Preview Lab → · Contrast checker → · Palette generator →