What color is #646A66?

#646A66 is a gray, closest to the named color Shadows. It belongs to the gray family of colors.

What is the RGB value of #646A66?

The RGB value is 100, 106, 102: 100 red, 106 green and 102 blue on a 0 to 255 scale.

What is the complementary color of #646A66?

The complementary color is #6A6468, found by rotating the hue 180° on the color wheel.

Is black or white text better on #646A66?

White text. Black text has a contrast ratio of 3.8:1 and white text 5.53:1. WCAG asks for at least 4.5:1 for normal text.

#646A66 color

#646A66 rgb(100, 106, 102)

Shades of gray

The hex color #646A66 is a gray.

In the RGB color model it is made of 39.2% red, 41.6% green and 40% blue (100, 106, 102).

Its hue angle is 140°, with 3% saturation and 40% lightness. For print, the CMYK equivalent is 6% cyan, 0% magenta, 4% yellow and 58% black.

The closest named color is Shadows (#6B6D6A), a difference of 2.7 ΔE, a small difference.

White text is the more readable choice on this background (contrast 5.53:1).

#646A66 color codes

HEX	`#646A66`
RGB	`rgb(100, 106, 102)`
RGB percent	`rgb(39.2%, 41.6%, 40%)`
HSL	`hsl(140, 3%, 40%)`
HSV / HSB	`hsv(140, 6%, 42%)`
CMYK	`cmyk(6%, 0%, 4%, 58%)`
CIE LAB	`lab(44.2, -3.14, 1.45)`
CIE LCH	`lch(44.2, 3.46, 155.29)`
CIE XYZ	`xyz(12.807, 13.977, 14.591)`
Decimal	`6580838`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #646A66, 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 #646A66	Ratio	AA	AAA	AA large
Sample text	3.8:1	Fail	Fail	Pass
Sample text	5.53:1	Pass	Fail	Pass

#646A66 as text on	Ratio	AA	AAA	AA large
Sample text	5.53:1	Pass	Fail	Pass
Sample text	3.8:1	Fail	Fail	Pass

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 #646A66 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #646a66; }
.text { color: #646a66; }
.border { border: 2px solid #646a66; }
.transparent { background-color: rgb(100 106 102 / 50%); }
.gradient { background: linear-gradient(to right, #646a66, #646a69); }

Background

Text color

Border

Similar colors

Questions

What color is #646A66?: #646A66 is a gray, closest to the named color Shadows. It belongs to the gray family of colors.
What is the RGB value of #646A66?: The RGB value is 100, 106, 102: 100 red, 106 green and 102 blue on a 0 to 255 scale.
What is the complementary color of #646A66?: The complementary color is #6A6468, found by rotating the hue 180° on the color wheel.
Is black or white text better on #646A66?: White text. Black text has a contrast ratio of 3.8:1 and white text 5.53:1. WCAG asks for at least 4.5:1 for normal text.