What color is #646C7F?

#646C7F is a grayish blue, closest to the named color Ashen Whisper. It belongs to the gray family of colors.

What is the RGB value of #646C7F?

The RGB value is 100, 108, 127: 100 red, 108 green and 127 blue on a 0 to 255 scale.

What is the complementary color of #646C7F?

The complementary color is #7F7764, found by rotating the hue 180° on the color wheel.

Is black or white text better on #646C7F?

White text. Black text has a contrast ratio of 3.99:1 and white text 5.26:1. WCAG asks for at least 4.5:1 for normal text.

#646C7F color

#646C7F rgb(100, 108, 127)

Shades of gray

The hex color #646C7F is a grayish blue.

In the RGB color model it is made of 39.2% red, 42.4% green and 49.8% blue (100, 108, 127).

Its hue angle is 222°, with 12% saturation and 45% lightness. For print, the CMYK equivalent is 21% cyan, 15% magenta, 0% yellow and 50% black.

The closest named color is Ashen Whisper (#646B7A), a difference of 1.8 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 5.26:1).

#646C7F color codes

HEX	`#646C7F`
RGB	`rgb(100, 108, 127)`
RGB percent	`rgb(39.2%, 42.4%, 49.8%)`
HSL	`hsl(222, 12%, 45%)`
HSV / HSB	`hsv(222, 21%, 50%)`
CMYK	`cmyk(21%, 15%, 0%, 50%)`
CIE LAB	`lab(45.59, 1.38, -11.53)`
CIE LCH	`lch(45.59, 11.61, 276.82)`
CIE XYZ	`xyz(14.448, 14.966, 22.202)`
Decimal	`6581375`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #646C7F, 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 #646C7F	Ratio	AA	AAA	AA large
Sample text	3.99:1	Fail	Fail	Pass
Sample text	5.26:1	Pass	Fail	Pass

#646C7F as text on	Ratio	AA	AAA	AA large
Sample text	5.26:1	Pass	Fail	Pass
Sample text	3.99:1	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 #646C7F looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #646c7f; }
.text { color: #646c7f; }
.border { border: 2px solid #646c7f; }
.transparent { background-color: rgb(100 108 127 / 50%); }
.gradient { background: linear-gradient(to right, #646c7f, #69647f); }

Background

Text color

Border

Similar colors

Closest common color name: Space Gray.

Questions

What color is #646C7F?: #646C7F is a grayish blue, closest to the named color Ashen Whisper. It belongs to the gray family of colors.
What is the RGB value of #646C7F?: The RGB value is 100, 108, 127: 100 red, 108 green and 127 blue on a 0 to 255 scale.
What is the complementary color of #646C7F?: The complementary color is #7F7764, found by rotating the hue 180° on the color wheel.
Is black or white text better on #646C7F?: White text. Black text has a contrast ratio of 3.99:1 and white text 5.26:1. WCAG asks for at least 4.5:1 for normal text.