What color is #66637B?

#66637B is a grayish blue, closest to the named color Heron. It belongs to the blue family of colors.

What is the RGB value of #66637B?

The RGB value is 102, 99, 123: 102 red, 99 green and 123 blue on a 0 to 255 scale.

What is the complementary color of #66637B?

The complementary color is #787B63, found by rotating the hue 180° on the color wheel.

Is black or white text better on #66637B?

White text. Black text has a contrast ratio of 3.64:1 and white text 5.78:1. WCAG asks for at least 4.5:1 for normal text.

#66637B color

#66637B rgb(102, 99, 123)

Shades of blue

The hex color #66637B is a grayish blue.

In the RGB color model it is made of 40% red, 38.8% green and 48.2% blue (102, 99, 123).

Its hue angle is 248°, with 11% saturation and 44% lightness. For print, the CMYK equivalent is 17% cyan, 20% magenta, 0% yellow and 52% black.

The closest named color is Heron (#6A6887), a difference of 3.2 ΔE, a small difference.

White text is the more readable choice on this background (contrast 5.78:1).

#66637B color codes

HEX	`#66637B`
RGB	`rgb(102, 99, 123)`
RGB percent	`rgb(40%, 38.8%, 48.2%)`
HSL	`hsl(248, 11%, 44%)`
HSV / HSB	`hsv(248, 20%, 48%)`
CMYK	`cmyk(17%, 20%, 0%, 52%)`
CIE LAB	`lab(43.03, 6.53, -12.98)`
CIE LCH	`lch(43.03, 14.53, 296.73)`
CIE XYZ	`xyz(13.516, 13.178, 20.567)`
Decimal	`6710139`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #66637B, 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 #66637B	Ratio	AA	AAA	AA large
Sample text	3.64:1	Fail	Fail	Pass
Sample text	5.78:1	Pass	Fail	Pass

#66637B as text on	Ratio	AA	AAA	AA large
Sample text	5.78:1	Pass	Fail	Pass
Sample text	3.64:1	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 #66637B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #66637b; }
.text { color: #66637b; }
.border { border: 2px solid #66637b; }
.transparent { background-color: rgb(102 99 123 / 50%); }
.gradient { background: linear-gradient(to right, #66637b, #72637b); }

Background

Text color

Border

Similar colors

Closest common color name: Space Gray.

Questions

What color is #66637B?: #66637B is a grayish blue, closest to the named color Heron. It belongs to the blue family of colors.
What is the RGB value of #66637B?: The RGB value is 102, 99, 123: 102 red, 99 green and 123 blue on a 0 to 255 scale.
What is the complementary color of #66637B?: The complementary color is #787B63, found by rotating the hue 180° on the color wheel.
Is black or white text better on #66637B?: White text. Black text has a contrast ratio of 3.64:1 and white text 5.78:1. WCAG asks for at least 4.5:1 for normal text.