#664b4b

Color #664b4b

A muted dark red.

Closest named color Dim Gray #696969 · ΔE 15.64 Nearest Tailwind class taupe-600 #5b4f4b · ΔE 7.2

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Conversions

HEX

#664b4b

RGB

rgb(102, 75, 75)

HSL

hsl(0, 15.3%, 34.7%)

HSV / HSB

hsv(0, 26.5%, 40%)

CMYK

cmyk(0%, 26.5%, 26.5%, 60%)

LAB

lab(34.73, 11.44, 4.47)

LCH

lch(34.73, 12.28, 21.34)

OKLCH

oklch(44.2%, 0.0368, 18.68)

HWB

hwb(0, 29.4%, 60%)

Harmony colors

Complementary

#4b6666

Analogous

#664b58

#664b4b

#66584b

Triadic

#664b4b

#4b664b

#4b4b66

Split-complementary

#664b4b

#4b6658

#4b5866

Tetradic

#664b4b

#66664b

#4b6666

#4b4b66

Square

#664b4b

#58664b

#4b6666

#584b66

Shades

Color #664b4b mixed toward black.

#553e3e

#443232

#332525

#221919

#110c0c

Tints

Color #664b4b mixed toward white.

#866262

#a17f7f

#b89f9f

#d0bfbf

#e7dfdf

Tones

Color #664b4b mixed toward gray.

#644d4d

#624f4f

#5f5252

#5d5454

#5b5656

Accessibility

Aa White text on this color

7.86:1

Aa Black text on this color

2.67:1

White text reads better on this background (7.86:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#5b5b4b · ΔE 19.2

Deuteranopia

#5d5f4b · ΔE 21.8

Tritanopia

#654b4b · ΔE 0.4

Achromatopsia

#525252 · ΔE 12.7

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

Code

CSS

background-color: #664b4b;

Tailwind (arbitrary value)

bg-[#664b4b]

Related colors

Red #ff0000

Maroon #800000

Black #000000

Brown #a52a2a

Dark Gray #a9a9a9

Dark Red #8b0000

Frequently asked questions

#664b4b (#664b4b) is rgb(102, 75, 75) in RGB.

No, #664b4b is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

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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 #664b4b, or check how it holds up for accessibility.

Generate a palette → Check contrast