What color is #643B37?

#643B37 is a dark, desaturated red, closest to the named color Hot Chocolate. It belongs to the brown family of colors.

What is the RGB value of #643B37?

The RGB value is 100, 59, 55: 100 red, 59 green and 55 blue on a 0 to 255 scale.

What is the complementary color of #643B37?

The complementary color is #376064, found by rotating the hue 180° on the color wheel.

Is black or white text better on #643B37?

White text. Black text has a contrast ratio of 2.22:1 and white text 9.45:1. WCAG asks for at least 4.5:1 for normal text.

#643B37 color

#643B37 rgb(100, 59, 55)

Shades of brown

The hex color #643B37 is a dark, desaturated red.

In the RGB color model it is made of 39.2% red, 23.1% green and 21.6% blue (100, 59, 55).

Its hue angle is 5°, with 29% saturation and 30% lightness. For print, the CMYK equivalent is 0% cyan, 41% magenta, 45% yellow and 61% black.

The closest named color is Hot Chocolate (#683939), a difference of 2.4 ΔE, a small difference.

White text is the more readable choice on this background (contrast 9.45:1).

#643B37 color codes

HEX	`#643B37`
RGB	`rgb(100, 59, 55)`
RGB percent	`rgb(39.2%, 23.1%, 21.6%)`
HSL	`hsl(5, 29%, 30%)`
HSV / HSB	`hsv(5, 45%, 39%)`
CMYK	`cmyk(0%, 41%, 45%, 61%)`
CIE LAB	`lab(29.7, 17.58, 10.17)`
CIE LCH	`lch(29.7, 20.3, 30.04)`
CIE XYZ	`xyz(7.509, 6.114, 4.398)`
Decimal	`6568759`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #643B37, 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 #643B37	Ratio	AA	AAA	AA large
Sample text	2.22:1	Fail	Fail	Fail
Sample text	9.45:1	Pass	Pass	Pass

#643B37 as text on	Ratio	AA	AAA	AA large
Sample text	9.45:1	Pass	Pass	Pass
Sample text	2.22:1	Fail	Fail	Fail

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 #643B37 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #643b37; }
.text { color: #643b37; }
.border { border: 2px solid #643b37; }
.transparent { background-color: rgb(100 59 55 / 50%); }
.gradient { background: linear-gradient(to right, #643b37, #645237); }

Background

Text color

Border

Similar colors

Closest common color name: Espresso.

Questions

What color is #643B37?: #643B37 is a dark, desaturated red, closest to the named color Hot Chocolate. It belongs to the brown family of colors.
What is the RGB value of #643B37?: The RGB value is 100, 59, 55: 100 red, 59 green and 55 blue on a 0 to 255 scale.
What is the complementary color of #643B37?: The complementary color is #376064, found by rotating the hue 180° on the color wheel.
Is black or white text better on #643B37?: White text. Black text has a contrast ratio of 2.22:1 and white text 9.45:1. WCAG asks for at least 4.5:1 for normal text.