#666b6f

Color #666b6f

A nearly neutral, gray-leaning medium blue.

Closest named color Dim Gray #696969 · ΔE 3.13 Nearest Tailwind class neutral-500 #737373 · ΔE 4.6

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#666b6f

RGB

rgb(102, 107, 111)

HSL

hsl(206.7, 4.2%, 41.8%)

HSV / HSB

hsv(206.7, 8.1%, 43.5%)

CMYK

cmyk(8.1%, 3.6%, 0%, 56.5%)

LAB

lab(44.92, -1.05, -2.9)

LCH

lch(44.92, 3.08, 250.1)

OKLCH

oklch(52.5%, 0.0089, 241.7)

HWB

hwb(206.7, 40%, 56.5%)

Harmony colors

Complementary

#6f6a66

Analogous

#666f6f

#666b6f

#66676f

Triadic

#666b6f

#6f666b

#6b6f66

Split-complementary

#666b6f

#6f6667

#6f6f66

Tetradic

#666b6f

#6a666f

#6f6a66

#6b6f66

Square

#666b6f

#6f666f

#6f6a66

#676f66

Shades

Color #666b6f mixed toward black.

#55595d

#44474a

#333638

#222425

#111213

Tints

Color #666b6f mixed toward white.

#7e8489

#989da0

#b2b5b8

#cbced0

#e5e6e7

Tones

Color #666b6f mixed toward gray.

#676b6e

#686b6e

#686b6d

#696b6c

#6a6b6b

Accessibility

Aa White text on this color

5.39:1

Aa Black text on this color

3.9:1

White text reads better on this background (5.39:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#68686e · ΔE 3.4

Deuteranopia

#68686e · ΔE 3.4

Tritanopia

#666d6d · ΔE 2.9

Achromatopsia

#6a6a6a · ΔE 3.1

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

Code

CSS

background-color: #666b6f;

Tailwind (arbitrary value)

bg-[#666b6f]

Related colors

Steel Blue #4682b4

Alice Blue #f0f8ff

Charcoal #36454f

Dodger Blue #1e90ff

Light Slate Gray #778899

Slate Gray #708090

Frequently asked questions

#666b6f (#666b6f) is rgb(102, 107, 111) in RGB.

No, #666b6f 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 #666b6f, or check how it holds up for accessibility.

Generate a palette → Check contrast