What color is #647B88?

#647B88 is a grayish azure, closest to the named color Citadel. It belongs to the gray family of colors.

What is the RGB value of #647B88?

The RGB value is 100, 123, 136: 100 red, 123 green and 136 blue on a 0 to 255 scale.

What is the complementary color of #647B88?

The complementary color is #887164, found by rotating the hue 180° on the color wheel.

Is black or white text better on #647B88?

Black text. Black text has a contrast ratio of 4.73:1 and white text 4.44:1. WCAG asks for at least 4.5:1 for normal text.

#647B88 color

#647B88 rgb(100, 123, 136)

Shades of gray

The hex color #647B88 is a grayish azure.

In the RGB color model it is made of 39.2% red, 48.2% green and 53.3% blue (100, 123, 136).

Its hue angle is 202°, with 15% saturation and 46% lightness. For print, the CMYK equivalent is 26% cyan, 10% magenta, 0% yellow and 47% black.

The closest named color is Citadel (#6A7F8B), a difference of 1.8 ΔE, which is barely visible.

Black text is the more readable choice on this background (contrast 4.73:1).

#647B88 color codes

HEX	`#647B88`
RGB	`rgb(100, 123, 136)`
RGB percent	`rgb(39.2%, 48.2%, 53.3%)`
HSL	`hsl(202, 15%, 46%)`
HSV / HSB	`hsv(202, 26%, 53%)`
CMYK	`cmyk(26%, 10%, 0%, 47%)`
CIE LAB	`lab(50.28, -5.18, -9.81)`
CIE LCH	`lch(50.28, 11.1, 242.17)`
CIE XYZ	`xyz(16.781, 18.652, 26.004)`
Decimal	`6585224`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #647B88, 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 #647B88	Ratio	AA	AAA	AA large
Sample text	4.73:1	Pass	Fail	Pass
Sample text	4.44:1	Fail	Fail	Pass

#647B88 as text on	Ratio	AA	AAA	AA large
Sample text	4.44:1	Fail	Fail	Pass
Sample text	4.73:1	Pass	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 #647B88 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #647b88; }
.text { color: #647b88; }
.border { border: 2px solid #647b88; }
.transparent { background-color: rgb(100 123 136 / 50%); }
.gradient { background: linear-gradient(to right, #647b88, #646988); }

Background

Text color

Border

Similar colors

Questions

What color is #647B88?: #647B88 is a grayish azure, closest to the named color Citadel. It belongs to the gray family of colors.
What is the RGB value of #647B88?: The RGB value is 100, 123, 136: 100 red, 123 green and 136 blue on a 0 to 255 scale.
What is the complementary color of #647B88?: The complementary color is #887164, found by rotating the hue 180° on the color wheel.
Is black or white text better on #647B88?: Black text. Black text has a contrast ratio of 4.73:1 and white text 4.44:1. WCAG asks for at least 4.5:1 for normal text.