What color is #645A5B?

#645A5B is a gray, closest to the named color Smokescreen. It belongs to the gray family of colors.

What is the RGB value of #645A5B?

The RGB value is 100, 90, 91: 100 red, 90 green and 91 blue on a 0 to 255 scale.

What is the complementary color of #645A5B?

The complementary color is #5A6463, found by rotating the hue 180° on the color wheel.

Is black or white text better on #645A5B?

White text. Black text has a contrast ratio of 3.16:1 and white text 6.66:1. WCAG asks for at least 4.5:1 for normal text.

#645A5B color

#645A5B rgb(100, 90, 91)

Shades of gray

The hex color #645A5B is a gray.

In the RGB color model it is made of 39.2% red, 35.3% green and 35.7% blue (100, 90, 91).

Its hue angle is 354°, with 5% saturation and 37% lightness. For print, the CMYK equivalent is 0% cyan, 10% magenta, 9% yellow and 61% black.

The closest named color is Smokescreen (#5E5755), a difference of 2.9 ΔE, a small difference.

White text is the more readable choice on this background (contrast 6.66:1).

#645A5B color codes

HEX	`#645A5B`
RGB	`rgb(100, 90, 91)`
RGB percent	`rgb(39.2%, 35.3%, 35.7%)`
HSL	`hsl(354, 5%, 37%)`
HSV / HSB	`hsv(354, 10%, 39%)`
CMYK	`cmyk(0%, 10%, 9%, 61%)`
CIE LAB	`lab(39.2, 4.23, 0.89)`
CIE LCH	`lch(39.2, 4.33, 11.93)`
CIE XYZ	`xyz(10.8, 10.777, 11.407)`
Decimal	`6576731`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #645A5B, 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 #645A5B	Ratio	AA	AAA	AA large
Sample text	3.16:1	Fail	Fail	Pass
Sample text	6.66:1	Pass	Fail	Pass

#645A5B as text on	Ratio	AA	AAA	AA large
Sample text	6.66:1	Pass	Fail	Pass
Sample text	3.16:1	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 #645A5B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #645a5b; }
.text { color: #645a5b; }
.border { border: 2px solid #645a5b; }
.transparent { background-color: rgb(100 90 91 / 50%); }
.gradient { background: linear-gradient(to right, #645a5b, #645e5a); }

Background

Text color

Border

Similar colors

Closest common color name: Umber.

Questions

What color is #645A5B?: #645A5B is a gray, closest to the named color Smokescreen. It belongs to the gray family of colors.
What is the RGB value of #645A5B?: The RGB value is 100, 90, 91: 100 red, 90 green and 91 blue on a 0 to 255 scale.
What is the complementary color of #645A5B?: The complementary color is #5A6463, found by rotating the hue 180° on the color wheel.
Is black or white text better on #645A5B?: White text. Black text has a contrast ratio of 3.16:1 and white text 6.66:1. WCAG asks for at least 4.5:1 for normal text.