What color is #645A57?

#645A57 is a gray, closest to the named color Smokescreen. It belongs to the gray family of colors.

What is the RGB value of #645A57?

The RGB value is 100, 90, 87: 100 red, 90 green and 87 blue on a 0 to 255 scale.

What is the complementary color of #645A57?

The complementary color is #576164, found by rotating the hue 180° on the color wheel.

Is black or white text better on #645A57?

White text. Black text has a contrast ratio of 3.14:1 and white text 6.68:1. WCAG asks for at least 4.5:1 for normal text.

#645A57 color

#645A57 rgb(100, 90, 87)

Shades of gray

The hex color #645A57 is a gray.

In the RGB color model it is made of 39.2% red, 35.3% green and 34.1% blue (100, 90, 87).

Its hue angle is 14°, with 7% saturation and 37% lightness. For print, the CMYK equivalent is 0% cyan, 10% magenta, 13% yellow and 61% black.

The closest named color is Smokescreen (#5E5755), a difference of 2 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 6.68:1).

#645A57 color codes

HEX	`#645A57`
RGB	`rgb(100, 90, 87)`
RGB percent	`rgb(39.2%, 35.3%, 34.1%)`
HSL	`hsl(14, 7%, 37%)`
HSV / HSB	`hsv(14, 13%, 39%)`
CMYK	`cmyk(0%, 10%, 13%, 61%)`
CIE LAB	`lab(39.09, 3.47, 3.2)`
CIE LCH	`lch(39.09, 4.72, 42.71)`
CIE XYZ	`xyz(10.632, 10.71, 10.522)`
Decimal	`6576727`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #645A57, 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 #645A57	Ratio	AA	AAA	AA large
Sample text	3.14:1	Fail	Fail	Pass
Sample text	6.68:1	Pass	Fail	Pass

#645A57 as text on	Ratio	AA	AAA	AA large
Sample text	6.68:1	Pass	Fail	Pass
Sample text	3.14:1	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 #645A57 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #645a57; }
.text { color: #645a57; }
.border { border: 2px solid #645a57; }
.transparent { background-color: rgb(100 90 87 / 50%); }
.gradient { background: linear-gradient(to right, #645a57, #646157); }

Background

Text color

Border

Similar colors

Closest common color name: Umber.

Questions

What color is #645A57?: #645A57 is a gray, closest to the named color Smokescreen. It belongs to the gray family of colors.
What is the RGB value of #645A57?: The RGB value is 100, 90, 87: 100 red, 90 green and 87 blue on a 0 to 255 scale.
What is the complementary color of #645A57?: The complementary color is #576164, found by rotating the hue 180° on the color wheel.
Is black or white text better on #645A57?: White text. Black text has a contrast ratio of 3.14:1 and white text 6.68:1. WCAG asks for at least 4.5:1 for normal text.