#66637a

Color #66637a

A nearly neutral, gray-leaning medium blue.

Closest named color Slate Gray #708090 · ΔE 13.1 Nearest Tailwind class mauve-500 #79697b · ΔE 6.5

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Conversions

HEX

#66637a

RGB

rgb(102, 99, 122)

HSL

hsl(247.8, 10.4%, 43.3%)

HSV / HSB

hsv(247.8, 18.9%, 47.8%)

CMYK

cmyk(16.4%, 18.9%, 0%, 52.2%)

LAB

lab(42.99, 6.29, -12.43)

LCH

lch(42.99, 13.93, 296.84)

OKLCH

oklch(51.1%, 0.0362, 291.04)

HWB

hwb(247.8, 38.8%, 52.2%)

Harmony colors

Complementary

#777a63

Analogous

#636b7a

#66637a

#71637a

Triadic

#66637a

#7a6663

#637a66

Split-complementary

#66637a

#7a7163

#6b7a63

Tetradic

#66637a

#7a6377

#777a63

#637a66

Square

#66637a

#7a636b

#777a63

#637a71

Shades

Color #66637a mixed toward black.

#555266

#444251

#33313d

#222129

#111014

Tints

Color #66637a mixed toward white.

#7d7a93

#9795a9

#b1afbe

#cbcad4

#e5e4e9

Tones

Color #66637a mixed toward gray.

#676578

#696776

#6a6974

#6c6b72

#6d6d70

Accessibility

Aa White text on this color

5.78:1

Aa Black text on this color

3.63:1

White text reads better on this background (5.78:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#656575 · ΔE 3.5

Deuteranopia

#656574 · ΔE 3.9

Tritanopia

#667170 · ΔE 15.6

Achromatopsia

#666666 · ΔE 11.5

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

Code

CSS

background-color: #66637a;

Tailwind (arbitrary value)

bg-[#66637a]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#66637a (#66637a) is rgb(102, 99, 122) in RGB.

No, #66637a 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.

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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 #66637a, or check how it holds up for accessibility.

Generate a palette → Check contrast