#666CDF#666CDF

#666CDF is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.5% C 0.172 H 277.4°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#666CDF
RGB	rgb(102, 108, 223)
HSL	hsl(237, 65%, 64%)
HSV	hsv(237, 54%, 87%)
CMYK	cmyk(54.3%, 51.6%, 0%, 12.5%)
CIE-LAB	lab(50.54, 29.90, -59.65)
CIE-LCH	lch(50.54, 66.72, 296.62°)
OKLab	oklab(58.54% 0.0222 -0.1705)
OKLCH	oklch(58.54% 0.172 277.4)
XYZ	xyz(24.1571, 18.8760, 72.1682)
Luminance	0.1888 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CDF #DFD966

analogous

#66A8DF #666CDF #9C66DF

triadic

#666CDF #DF666C #6CDF66

tetradic

#666CDF #DF66A8 #DFD966 #66DF9C

square

#666CDF #DF66A8 #DFD966 #66DF9C

split-complementary

#666CDF #DF9C66 #A8DF66

monochromatic

#232AA8 #333BD4 #666CDF #999DEA #CBCDF4

Accessibility & contrast

On white

4.40

#666CDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#666CDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CDF

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CDF	#FFFFFF	#000000	##000000
##666CDF	1.00	4.40	4.78	4.78
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E7DE3

Deuteranopia (green-blind)

#1974DD

Tritanopia (blue-blind)

#2A869B

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666cdf;
/* rgb */ color: rgb(102, 108, 223);
/* oklch */ color: oklch(58.5% 0.172 277.4);

Tailwind

colors: {
  custom: {
    50: '#9a96ea',
    500: '#666cdf',
    950: '#000000',
  },
}

SCSS

$custom: #666cdf;
$custom-light: #9a96ea;
$custom-dark: #000000;

JSON

{
  "hex": "#666cdf",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 223
  },
  "hsl": {
    "h": 237.025,
    "s": 65.405,
    "l": 63.725
  },
  "oklch": {
    "l": 0.58536,
    "c": 0.17192,
    "h": 277.4
  },
  "luminance": 0.18878
}

Semantic roles & 50–950 ramp

primary

#666CDF

secondary

#E6E4BB

accent

#C418CD

background

#FAF9FE

surface

#F3F1FD

border

#CDCBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666CDF

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

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