What color is #646D8F?

#646D8F is a grayish blue, closest to the named color Haunt Mist. It belongs to the blue family of colors.

What is the RGB value of #646D8F?

The RGB value is 100, 109, 143: 100 red, 109 green and 143 blue on a 0 to 255 scale.

What is the complementary color of #646D8F?

The complementary color is #8F8664, found by rotating the hue 180° on the color wheel.

Is black or white text better on #646D8F?

White text. Black text has a contrast ratio of 4.13:1 and white text 5.09:1. WCAG asks for at least 4.5:1 for normal text.

#646D8F color

#646D8F rgb(100, 109, 143)

Shades of blue

The hex color #646D8F is a grayish blue.

In the RGB color model it is made of 39.2% red, 42.7% green and 56.1% blue (100, 109, 143).

Its hue angle is 227°, with 18% saturation and 48% lightness. For print, the CMYK equivalent is 30% cyan, 24% magenta, 0% yellow and 44% black.

The closest named color is Haunt Mist (#5F6D91), a difference of 1.9 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 5.09:1).

#646D8F color codes

HEX	`#646D8F`
RGB	`rgb(100, 109, 143)`
RGB percent	`rgb(39.2%, 42.7%, 56.1%)`
HSL	`hsl(227, 18%, 48%)`
HSV / HSB	`hsv(227, 30%, 56%)`
CMYK	`cmyk(30%, 24%, 0%, 44%)`
CIE LAB	`lab(46.48, 4.9, -19.71)`
CIE LCH	`lch(46.48, 20.31, 283.96)`
CIE XYZ	`xyz(15.681, 15.629, 28.172)`
Decimal	`6581647`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #646D8F, 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 #646D8F	Ratio	AA	AAA	AA large
Sample text	4.13:1	Fail	Fail	Pass
Sample text	5.09:1	Pass	Fail	Pass

#646D8F as text on	Ratio	AA	AAA	AA large
Sample text	5.09:1	Pass	Fail	Pass
Sample text	4.13:1	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 #646D8F looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #646d8f; }
.text { color: #646d8f; }
.border { border: 2px solid #646d8f; }
.transparent { background-color: rgb(100 109 143 / 50%); }
.gradient { background: linear-gradient(to right, #646d8f, #71648f); }

Background

Text color

Border

Similar colors

Closest common color name: Slate Gray.

Questions

What color is #646D8F?: #646D8F is a grayish blue, closest to the named color Haunt Mist. It belongs to the blue family of colors.
What is the RGB value of #646D8F?: The RGB value is 100, 109, 143: 100 red, 109 green and 143 blue on a 0 to 255 scale.
What is the complementary color of #646D8F?: The complementary color is #8F8664, found by rotating the hue 180° on the color wheel.
Is black or white text better on #646D8F?: White text. Black text has a contrast ratio of 4.13:1 and white text 5.09:1. WCAG asks for at least 4.5:1 for normal text.