666666 #666666

Web Safe Color

Copy-ready color values

HEX#666666

RGBrgb(102, 102, 102)

HSLhsl(0, 0%, 40%)

HSVhsv(0, 0%, 40%)

CMYK approx.cmyk(0, 0, 0, 60)

Color value table

Format	Value	Copy
HEX	`#666666`
RGB	`rgb(102, 102, 102)`
HSL	`hsl(0, 0%, 40%)`
HSV	`hsv(0, 0%, 40%)`
CMYK approx.	`cmyk(0, 0, 0, 60)`
CSS keyword	`666666`

Contrast and classification

DarkLightness5.74:1Contrast with white3.66:1Contrast with blackGrayscaleColor family

Shade and tint preview

White 10%
#757575

White 30%
#949494

White 70%
#D1D1D1

White 90%
#F0F0F0

Black 10%
#5C5C5C

Black 30%
#474747

Black 70%
#1F1F1F

Black 90%
#0A0A0A

Harmony palettes

Complementary

#999999

#B1B1B1

Analogous

#666666

Triadic

#666666

Split complementary

#ABABAB

#7D7D7D

Using 666666

666666 works best when it is chosen with contrast, surrounding colors, and interface state in mind. Use the HEX value for static CSS, RGB when you need channel-level control, and HSL when adjusting lightness or saturation for hover states. The CMYK value is an approximate screen-to-print conversion, so print workflows should still rely on calibrated design software or a printer profile.

CSS, SCSS, and Tailwind examples

:root {
  --color-666666: #666666;
}

.button-primary {
  background: var(--color-666666);
  color: #ffffff;
}

$666666: #666666;

// Tailwind arbitrary value
class="bg-[#666666] text-white"