What color is #555B66?

#555B66 is a dark, grayish azure, closest to the named color Concrete Landscape. It belongs to the gray family of colors.

What is the RGB value of #555B66?

The RGB value is 85, 91, 102: 85 red, 91 green and 102 blue on a 0 to 255 scale.

What is the complementary color of #555B66?

The complementary color is #666055, found by rotating the hue 180° on the color wheel.

Is black or white text better on #555B66?

White text. Black text has a contrast ratio of 3.07:1 and white text 6.83:1. WCAG asks for at least 4.5:1 for normal text.

#555B66 color

#555B66 rgb(85, 91, 102)

Shades of gray

The hex color #555B66 is a dark, grayish azure.

In the RGB color model it is made of 33.3% red, 35.7% green and 40% blue (85, 91, 102).

Its hue angle is 219°, with 9% saturation and 37% lightness. For print, the CMYK equivalent is 17% cyan, 11% magenta, 0% yellow and 60% black.

The closest named color is Concrete Landscape (#5C606E), a difference of 3 ΔE, a small difference.

White text is the more readable choice on this background (contrast 6.83:1).

#555B66 color codes

HEX	`#555B66`
RGB	`rgb(85, 91, 102)`
RGB percent	`rgb(33.3%, 35.7%, 40%)`
HSL	`hsl(219, 9%, 37%)`
HSV / HSB	`hsv(219, 17%, 40%)`
CMYK	`cmyk(17%, 11%, 0%, 60%)`
CIE LAB	`lab(38.5, 0.21, -7.09)`
CIE LCH	`lch(38.5, 7.1, 271.68)`
CIE XYZ	`xyz(9.885, 10.373, 14.049)`
Decimal	`5593958`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #555B66, 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 #555B66	Ratio	AA	AAA	AA large
Sample text	3.07:1	Fail	Fail	Pass
Sample text	6.83:1	Pass	Fail	Pass

#555B66 as text on	Ratio	AA	AAA	AA large
Sample text	6.83:1	Pass	Fail	Pass
Sample text	3.07:1	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 #555B66 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #555b66; }
.text { color: #555b66; }
.border { border: 2px solid #555b66; }
.transparent { background-color: rgb(85 91 102 / 50%); }
.gradient { background: linear-gradient(to right, #555b66, #575566); }

Background

Text color

Border

Similar colors

Closest common color name: Dim Gray.

Questions

What color is #555B66?: #555B66 is a dark, grayish azure, closest to the named color Concrete Landscape. It belongs to the gray family of colors.
What is the RGB value of #555B66?: The RGB value is 85, 91, 102: 85 red, 91 green and 102 blue on a 0 to 255 scale.
What is the complementary color of #555B66?: The complementary color is #666055, found by rotating the hue 180° on the color wheel.
Is black or white text better on #555B66?: White text. Black text has a contrast ratio of 3.07:1 and white text 6.83:1. WCAG asks for at least 4.5:1 for normal text.