#666571

Color #666571

A nearly neutral, gray-leaning medium blue.

Closest named color Dim Gray #696969 · ΔE 7.32 Nearest Tailwind class zinc-500 #71717b · ΔE 4.7

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

Conversions

HEX

#666571

RGB

rgb(102, 101, 113)

HSL

hsl(245, 5.6%, 42%)

HSV / HSB

hsv(245, 10.6%, 44.3%)

CMYK

cmyk(9.7%, 10.6%, 0%, 55.7%)

LAB

lab(43.25, 2.98, -6.59)

LCH

lch(43.25, 7.23, 294.33)

OKLCH

oklch(51.2%, 0.0188, 289.59)

HWB

hwb(245, 39.6%, 55.7%)

Harmony colors

Complementary

#707165

Analogous

#656a71

#666571

#6c6571

Triadic

#666571

#716665

#657166

Split-complementary

#666571

#716c65

#6a7165

Tetradic

#666571

#716570

#707165

#657166

Square

#666571

#71656a

#707165

#65716c

Shades

Color #666571 mixed toward black.

#55545e

#44434b

#333339

#222226

#111113

Tints

Color #666571 mixed toward white.

#7e7d8b

#9897a2

#b2b1b9

#cbcbd0

#e5e5e8

Tones

Color #666571 mixed toward gray.

#676670

#68676f

#69686e

#69696d

#6a6a6c

Accessibility

Aa White text on this color

5.73:1

Aa Black text on this color

3.66:1

White text reads better on this background (5.73:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#66666e · ΔE 2.2

Deuteranopia

#66666e · ΔE 2.2

Tritanopia

#666c6c · ΔE 8.7

Achromatopsia

#666666 · ΔE 6.8

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

Code

CSS

background-color: #666571;

Tailwind (arbitrary value)

bg-[#666571]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#666571 (#666571) is rgb(102, 101, 113) in RGB.

No, #666571 is not web-safe. The nearest web-safe colors are among its tones and shades below.

Related tools

Colors

HEX to RGB Converter

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

Try it → Accessibility

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 #666571, or check how it holds up for accessibility.

Generate a palette → Check contrast