What color is #645B1F?

#645B1F is a dark, moderate yellow, closest to the named color Reptile Revenge. It belongs to the yellow family of colors.

What is the RGB value of #645B1F?

The RGB value is 100, 91, 31: 100 red, 91 green and 31 blue on a 0 to 255 scale.

What is the complementary color of #645B1F?

The complementary color is #1F2864, found by rotating the hue 180° on the color wheel.

Is black or white text better on #645B1F?

White text. Black text has a contrast ratio of 3.06:1 and white text 6.87:1. WCAG asks for at least 4.5:1 for normal text.

#645B1F color

#645B1F rgb(100, 91, 31)

Shades of yellow

The hex color #645B1F is a dark, moderate yellow.

In the RGB color model it is made of 39.2% red, 35.7% green and 12.2% blue (100, 91, 31).

Its hue angle is 52°, with 53% saturation and 26% lightness. For print, the CMYK equivalent is 0% cyan, 9% magenta, 69% yellow and 61% black.

The closest named color is Reptile Revenge (#5E582B), a difference of 3.6 ΔE, a small difference.

White text is the more readable choice on this background (contrast 6.87:1).

#645B1F color codes

HEX	`#645B1F`
RGB	`rgb(100, 91, 31)`
RGB percent	`rgb(39.2%, 35.7%, 12.2%)`
HSL	`hsl(52, 53%, 26%)`
HSV / HSB	`hsv(52, 69%, 39%)`
CMYK	`cmyk(0%, 9%, 69%, 61%)`
CIE LAB	`lab(38.36, -4.37, 34.72)`
CIE LCH	`lch(38.36, 35, 97.17)`
CIE XYZ	`xyz(9.244, 10.291, 2.795)`
Decimal	`6576927`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #645B1F, 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 #645B1F	Ratio	AA	AAA	AA large
Sample text	3.06:1	Fail	Fail	Pass
Sample text	6.87:1	Pass	Fail	Pass

#645B1F as text on	Ratio	AA	AAA	AA large
Sample text	6.87:1	Pass	Fail	Pass
Sample text	3.06:1	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 #645B1F looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #645b1f; }
.text { color: #645b1f; }
.border { border: 2px solid #645b1f; }
.transparent { background-color: rgb(100 91 31 / 50%); }
.gradient { background: linear-gradient(to right, #645b1f, #4b641f); }

Background

Text color

Border

Similar colors

Questions

What color is #645B1F?: #645B1F is a dark, moderate yellow, closest to the named color Reptile Revenge. It belongs to the yellow family of colors.
What is the RGB value of #645B1F?: The RGB value is 100, 91, 31: 100 red, 91 green and 31 blue on a 0 to 255 scale.
What is the complementary color of #645B1F?: The complementary color is #1F2864, found by rotating the hue 180° on the color wheel.
Is black or white text better on #645B1F?: White text. Black text has a contrast ratio of 3.06:1 and white text 6.87:1. WCAG asks for at least 4.5:1 for normal text.