What color is #645C39?

#645C39 is a dark, desaturated yellow, closest to the named color Olive Bark. It belongs to the brown family of colors.

What is the RGB value of #645C39?

The RGB value is 100, 92, 57: 100 red, 92 green and 57 blue on a 0 to 255 scale.

What is the complementary color of #645C39?

The complementary color is #394164, found by rotating the hue 180° on the color wheel.

Is black or white text better on #645C39?

White text. Black text has a contrast ratio of 3.13:1 and white text 6.71:1. WCAG asks for at least 4.5:1 for normal text.

#645C39 color

#645C39 rgb(100, 92, 57)

Shades of brown

The hex color #645C39 is a dark, desaturated yellow.

In the RGB color model it is made of 39.2% red, 36.1% green and 22.4% blue (100, 92, 57).

Its hue angle is 49°, with 27% saturation and 31% lightness. For print, the CMYK equivalent is 0% cyan, 8% magenta, 43% yellow and 61% black.

The closest named color is Olive Bark (#5F5537), a difference of 3 ΔE, a small difference.

White text is the more readable choice on this background (contrast 6.71:1).

#645C39 color codes

HEX	`#645C39`
RGB	`rgb(100, 92, 57)`
RGB percent	`rgb(39.2%, 36.1%, 22.4%)`
HSL	`hsl(49, 27%, 31%)`
HSV / HSB	`hsv(49, 43%, 39%)`
CMYK	`cmyk(0%, 8%, 43%, 61%)`
CIE LAB	`lab(39, -2.44, 21.3)`
CIE LCH	`lch(39, 21.44, 96.54)`
CIE XYZ	`xyz(9.821, 10.659, 5.41)`
Decimal	`6577209`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #645C39, 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 #645C39	Ratio	AA	AAA	AA large
Sample text	3.13:1	Fail	Fail	Pass
Sample text	6.71:1	Pass	Fail	Pass

#645C39 as text on	Ratio	AA	AAA	AA large
Sample text	6.71:1	Pass	Fail	Pass
Sample text	3.13:1	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 #645C39 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #645c39; }
.text { color: #645c39; }
.border { border: 2px solid #645c39; }
.transparent { background-color: rgb(100 92 57 / 50%); }
.gradient { background: linear-gradient(to right, #645c39, #566439); }

Background

Text color

Border

Similar colors

Closest common color name: Army Green.

Questions

What color is #645C39?: #645C39 is a dark, desaturated yellow, closest to the named color Olive Bark. It belongs to the brown family of colors.
What is the RGB value of #645C39?: The RGB value is 100, 92, 57: 100 red, 92 green and 57 blue on a 0 to 255 scale.
What is the complementary color of #645C39?: The complementary color is #394164, found by rotating the hue 180° on the color wheel.
Is black or white text better on #645C39?: White text. Black text has a contrast ratio of 3.13:1 and white text 6.71:1. WCAG asks for at least 4.5:1 for normal text.