What color is #660000?

#660000 is a dark, vivid red, closest to the named color Spikey Red. It belongs to the red family of colors.

What is the RGB value of #660000?

The RGB value is 102, 0, 0: 102 red, 0 green and 0 blue on a 0 to 255 scale.

What is the complementary color of #660000?

The complementary color is #006666, found by rotating the hue 180° on the color wheel.

Is black or white text better on #660000?

White text. Black text has a contrast ratio of 1.56:1 and white text 13.42:1. WCAG asks for at least 4.5:1 for normal text.

#660000 color

#660000 rgb(102, 0, 0)

Shades of red

The hex color #660000 is a dark, vivid red.

In the RGB color model it is made of 40% red, 0% green and 0% blue (102, 0, 0).

Its hue angle is 0°, with 100% saturation and 20% lightness. For print, the CMYK equivalent is 0% cyan, 100% magenta, 100% yellow and 60% black.

The closest named color is Spikey Red (#600000), a difference of 1.4 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 13.42:1).

#660000 color codes

HEX	`#660000`
RGB	`rgb(102, 0, 0)`
RGB percent	`rgb(40%, 0%, 0%)`
HSL	`hsl(0, 100%, 20%)`
HSV / HSB	`hsv(0, 100%, 40%)`
CMYK	`cmyk(0%, 100%, 100%, 60%)`
CIE LAB	`lab(19.33, 40.87, 29.66)`
CIE LCH	`lch(19.33, 50.5, 35.97)`
CIE XYZ	`xyz(5.48, 2.826, 0.257)`
Decimal	`6684672`
Short hex	`#600`

Color harmonies

Colors that go with #660000, based on their position on the color wheel.

Complementary

The color opposite on the color wheel (180°). Strongest contrast.

Analogous

Neighbors 30° either side. Calm, natural combinations.

Split complementary

The two colors next to the complement (150° and 210°).

Triadic

Three colors evenly spaced, 120° apart.

Tetradic (square)

Four colors 90° apart.

Shades, tints and tones

Shades (darker, mixed with black)

Tints (lighter, mixed with white)

Tones (mixed with gray)

Contrast and accessibility

Text on #660000	Ratio	AA	AAA	AA large
Sample text	1.56:1	Fail	Fail	Fail
Sample text	13.42:1	Pass	Pass	Pass

#660000 as text on	Ratio	AA	AAA	AA large
Sample text	13.42:1	Pass	Pass	Pass
Sample text	1.56:1	Fail	Fail	Fail

WCAG 2 asks for 4.5:1 for normal text (AA), 7:1 for AAA, and 3:1 for large text. Check other pairs.

Color blindness simulation

How #660000 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #660000; }
.text { color: #660000; }
.border { border: 2px solid #660000; }
.transparent { background-color: rgb(102 0 0 / 50%); }
.gradient { background: linear-gradient(to right, #660000, #663300); }

Background

Text color

Border

Similar colors

Closest common color name: Maroon.

Questions

What color is #660000?: #660000 is a dark, vivid red, closest to the named color Spikey Red. It belongs to the red family of colors.
What is the RGB value of #660000?: The RGB value is 102, 0, 0: 102 red, 0 green and 0 blue on a 0 to 255 scale.
What is the complementary color of #660000?: The complementary color is #006666, found by rotating the hue 180° on the color wheel.
Is black or white text better on #660000?: White text. Black text has a contrast ratio of 1.56:1 and white text 13.42:1. WCAG asks for at least 4.5:1 for normal text.