#666666 Color (Hex and RGB)

#666666

rgb(102 102 102) · reads as gray

#666666 has RGB values (102, 102, 102). This hex code is also a web-safe color equal to #666. The color reads primarily as gray in sRGB space.

Color values

Format	Value	Channels
HEX	`#666666`	R66G66B66
RGB	`rgb(102 102 102)`	R102G102B102
HSL	`hsl(0 0% 40%)`	H0°S0%L40%
OKLCH	`oklch(51% 0 90)`	L0.51C0H90°
HSV	`hsv(0, 0%, 40%)`	H0°S0%V40%
CMYK	`cmyk(0%, 0%, 0%, 60%)`	C0%M0%Y0%K60%

RGB mix

Red102 40%
Green102 40%
Blue102 40%

Base numbers

Base	R	G	B
Binary	`01100110`	`01100110`	`01100110`
Octal	`146`	`146`	`146`
Decimal	`102`	`102`	`102`
Hex	`66`	`66`	`66`

Shades & tints

Shades mix #666666 with black; tints mix it with white. Click any swatch to explore it.

Shades

Tints

Color harmonies

Complementary

Opposite on the color wheel — maximum contrast.

Analogous

Neighbors 30° either side — calm and cohesive.

Triadic

Three hues spaced 120° apart — vibrant balance.

Monochromatic

Same hue and saturation, different lightness.

Similar brand colors

The closest colors from our brand palettes, measured in OKLab.

Contrast & accessibility

WCAG 2.1 contrast against white and black. Test other pairs in the contrast checker.

#666666 on #FFFFFF

5.74:1

AA ✓AAA ✕AA Large ✓AAA Large ✓

#666666 on #000000

3.66:1

AA ✕AAA ✕AA Large ✓AAA Large ✕

#FFFFFF on #666666