What color is #647C7F?

#647C7F is a grayish cyan, closest to the named color Catfish. It belongs to the gray family of colors.

What is the RGB value of #647C7F?

The RGB value is 100, 124, 127: 100 red, 124 green and 127 blue on a 0 to 255 scale.

What is the complementary color of #647C7F?

The complementary color is #7F6764, found by rotating the hue 180° on the color wheel.

Is black or white text better on #647C7F?

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.

#647C7F color

#647C7F rgb(100, 124, 127)

Shades of gray

The hex color #647C7F is a grayish cyan.

In the RGB color model it is made of 39.2% red, 48.6% green and 49.8% blue (100, 124, 127).

Its hue angle is 187°, with 12% saturation and 45% lightness. For print, the CMYK equivalent is 21% cyan, 2% magenta, 0% yellow and 50% black.

The closest named color is Catfish (#657D82), a difference of 1.2 ΔE, which is barely visible.

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

#647C7F color codes

HEX	`#647C7F`
RGB	`rgb(100, 124, 127)`
RGB percent	`rgb(39.2%, 48.6%, 49.8%)`
HSL	`hsl(187, 12%, 45%)`
HSV / HSB	`hsv(187, 21%, 50%)`
CMYK	`cmyk(21%, 2%, 0%, 50%)`
CIE LAB	`lab(50.28, -7.95, -4.51)`
CIE LCH	`lch(50.28, 9.14, 209.59)`
CIE XYZ	`xyz(16.293, 18.656, 22.817)`
Decimal	`6585471`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #647C7F, 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 #647C7F	Ratio	AA	AAA	AA large
Sample text	4.73:1	Pass	Fail	Pass
Sample text	4.44:1	Fail	Fail	Pass

#647C7F 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 #647C7F looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #647c7f; }
.text { color: #647c7f; }
.border { border: 2px solid #647c7f; }
.transparent { background-color: rgb(100 124 127 / 50%); }
.gradient { background: linear-gradient(to right, #647c7f, #646f7f); }

Background

Text color

Border

Similar colors

Closest common color name: Smoke.

Questions

What color is #647C7F?: #647C7F is a grayish cyan, closest to the named color Catfish. It belongs to the gray family of colors.
What is the RGB value of #647C7F?: The RGB value is 100, 124, 127: 100 red, 124 green and 127 blue on a 0 to 255 scale.
What is the complementary color of #647C7F?: The complementary color is #7F6764, found by rotating the hue 180° on the color wheel.
Is black or white text better on #647C7F?: 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.