What color is #666581?

#666581 is a grayish blue, closest to the named color Heron. It belongs to the blue family of colors.

What is the RGB value of #666581?

The RGB value is 102, 101, 129: 102 red, 101 green and 129 blue on a 0 to 255 scale.

What is the complementary color of #666581?

The complementary color is #808165, found by rotating the hue 180° on the color wheel.

Is black or white text better on #666581?

White text. Black text has a contrast ratio of 3.74:1 and white text 5.61:1. WCAG asks for at least 4.5:1 for normal text.

#666581 color

#666581 rgb(102, 101, 129)

Shades of blue

The hex color #666581 is a grayish blue.

In the RGB color model it is made of 40% red, 39.6% green and 50.6% blue (102, 101, 129).

Its hue angle is 242°, with 12% saturation and 45% lightness. For print, the CMYK equivalent is 21% cyan, 22% magenta, 0% yellow and 49% black.

The closest named color is Heron (#6A6887), a difference of 1.7 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 5.61:1).

#666581 color codes

HEX	`#666581`
RGB	`rgb(102, 101, 129)`
RGB percent	`rgb(40%, 39.6%, 50.6%)`
HSL	`hsl(242, 12%, 45%)`
HSV / HSB	`hsv(242, 22%, 51%)`
CMYK	`cmyk(21%, 22%, 0%, 49%)`
CIE LAB	`lab(43.82, 6.79, -15.39)`
CIE LCH	`lch(43.82, 16.82, 293.8)`
CIE XYZ	`xyz(14.095, 13.717, 22.67)`
Decimal	`6710657`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #666581, 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 #666581	Ratio	AA	AAA	AA large
Sample text	3.74:1	Fail	Fail	Pass
Sample text	5.61:1	Pass	Fail	Pass

#666581 as text on	Ratio	AA	AAA	AA large
Sample text	5.61:1	Pass	Fail	Pass
Sample text	3.74:1	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 #666581 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #666581; }
.text { color: #666581; }
.border { border: 2px solid #666581; }
.transparent { background-color: rgb(102 101 129 / 50%); }
.gradient { background: linear-gradient(to right, #666581, #746581); }

Background

Text color

Border

Similar colors

Closest common color name: Space Gray.

Questions

What color is #666581?: #666581 is a grayish blue, closest to the named color Heron. It belongs to the blue family of colors.
What is the RGB value of #666581?: The RGB value is 102, 101, 129: 102 red, 101 green and 129 blue on a 0 to 255 scale.
What is the complementary color of #666581?: The complementary color is #808165, found by rotating the hue 180° on the color wheel.
Is black or white text better on #666581?: White text. Black text has a contrast ratio of 3.74:1 and white text 5.61:1. WCAG asks for at least 4.5:1 for normal text.