#666CDA#666CDA

#666CDA is a mid, vivid blue. Relative luminance 0.186; OKLCH L 58.2% C 0.165 H 277.6°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#666CDA
RGB	rgb(102, 108, 218)
HSL	hsl(237, 61%, 63%)
HSV	hsv(237, 53%, 85%)
CMYK	cmyk(53.2%, 50.5%, 0%, 14.5%)
CIE-LAB	lab(50.23, 28.32, -57.33)
CIE-LCH	lch(50.23, 63.94, 296.29°)
OKLab	oklab(58.2% 0.0218 -0.1636)
OKLCH	oklch(58.2% 0.165 277.6)
XYZ	xyz(23.4929, 18.6104, 68.6703)
Luminance	0.1861 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CDA #DAD466

analogous

#66A6DA #666CDA #9A66DA

triadic

#666CDA #DA666C #6CDA66

tetradic

#666CDA #DA66A6 #DAD466 #66DA9A

square

#666CDA #DA66A6 #DAD466 #66DA9A

split-complementary

#666CDA #DA9A66 #A6DA66

monochromatic

#262D9F #353DCE #666CDA #979BE6 #C9CBF2

Accessibility & contrast

On white

4.45

#666CDA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#666CDA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CDA

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CDA	#FFFFFF	#000000	##000000
##666CDA	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#347CDE

Deuteranopia (green-blind)

#2473D8

Tritanopia (blue-blind)

#308599

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666cda;
/* rgb */ color: rgb(102, 108, 218);
/* oklch */ color: oklch(58.2% 0.165 277.6);

Tailwind

colors: {
  custom: {
    50: '#9a96e6',
    500: '#666cda',
    950: '#000000',
  },
}

SCSS

$custom: #666cda;
$custom-light: #9a96e6;
$custom-dark: #000000;

JSON

{
  "hex": "#666cda",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 218
  },
  "hsl": {
    "h": 236.897,
    "s": 61.053,
    "l": 62.745
  },
  "oklch": {
    "l": 0.582,
    "c": 0.1651,
    "h": 277.6
  },
  "luminance": 0.18612
}

Semantic roles & 50–950 ramp

primary

#666CDA

secondary

#E3E1B9

accent

#C01DC9

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #666CDA

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

Preview Lab → · Contrast checker → · Palette generator →