660000 #660000

Web Safe Color

Copy-ready color values

HEX#660000

RGBrgb(102, 0, 0)

HSLhsl(0, 100%, 20%)

HSVhsv(0, 100%, 40%)

CMYK approx.cmyk(0, 100, 100, 60)

Color value table

Format	Value	Copy
HEX	`#660000`
RGB	`rgb(102, 0, 0)`
HSL	`hsl(0, 100%, 20%)`
HSV	`hsv(0, 100%, 40%)`
CMYK approx.	`cmyk(0, 100, 100, 60)`
CSS keyword	`660000`

Contrast and classification

DarkLightness13.42:1Contrast with white1.56:1Contrast with blackMagenta / PurpleColor family

Shade and tint preview

White 10%
#751A1A

White 30%
#944D4D

White 70%
#D1B3B3

White 90%
#F0E6E6

Black 10%
#5C0000

Black 30%
#470000

Black 70%
#1F0000

Black 90%
#0A0000

Harmony palettes

Complementary

#99FFFF

#B1FFFF

Analogous

#5A000C

#660000

Triadic

#000066

#006600

Split complementary

#ABFFFF

#7DD1D1

Using 660000

660000 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-660000: #660000;
}

.button-primary {
  background: var(--color-660000);
  color: #ffffff;
}

$660000: #660000;

// Tailwind arbitrary value
class="bg-[#660000] text-white"