#645f55

Color #645f55

A nearly neutral, gray-leaning dark orange.

Closest named color Dim Gray #696969 · ΔE 7.54 Nearest Tailwind class stone-600 #57534d · ΔE 4.7

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Conversions

HEX

#645f55

RGB

rgb(100, 95, 85)

HSL

hsl(40, 8.1%, 36.3%)

HSV / HSB

hsv(40, 15%, 39.2%)

CMYK

cmyk(0%, 5%, 15%, 60.8%)

LAB

lab(40.49, 0.07, 6.44)

LCH

lch(40.49, 6.44, 89.38)

OKLCH

oklch(48.7%, 0.0169, 84.56)

HWB

hwb(40, 33.3%, 60.8%)

Harmony colors

Complementary

#555a64

Analogous

#645855

#645f55

#626455

Triadic

#645f55

#55645f

#5f5564

Split-complementary

#645f55

#556264

#585564

Tetradic

#645f55

#5a6455

#555a64

#5f5564

Square

#645f55

#556458

#555a64

#645562

Shades

Color #645f55 mixed toward black.

#534f47

#433f39

#32302b

#21201c

#11100e

Tints

Color #645f55 mixed toward white.

#817b6e

#9b968a

#b4b0a7

#cdcac4

#e6e5e2

Tones

Color #645f55 mixed toward gray.

#635f56

#625e58

#605e59

#5f5d5a

#5e5d5b

Accessibility

Aa White text on this color

6.34:1

Aa Black text on this color

3.31:1

White text reads better on this background (6.34:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#626258 · ΔE 3

Deuteranopia

#626358 · ΔE 3.8

Tritanopia

#64595a · ΔE 8.3

Achromatopsia

#5f5f5f · ΔE 5.6

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #645f55;

Tailwind (arbitrary value)

bg-[#645f55]

Related colors

Floral White #fffaf0

Old Lace #fdf5e6

Wheat #f5deb3

Orange #ffa500

Moccasin #ffe4b5

Dark Goldenrod #b8860b

Frequently asked questions

#645f55 (#645f55) is rgb(100, 95, 85) in RGB.

No, #645f55 is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

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Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

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Build something with this color

Generate a full palette from #645f55, or check how it holds up for accessibility.

Generate a palette → Check contrast