#51666f

Color #51666f

A muted dark cyan.

Closest named color Dim Gray #696969 · ΔE 9.8 Nearest Tailwind class mist-600 #4b585b · ΔE 5.8

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Conversions

HEX

#51666f

RGB

rgb(81, 102, 111)

HSL

hsl(198, 15.6%, 37.6%)

HSV / HSB

hsv(198, 27%, 43.5%)

CMYK

cmyk(27%, 8.1%, 0%, 56.5%)

LAB

lab(41.84, -5.57, -7.64)

LCH

lch(41.84, 9.45, 233.91)

OKLCH

oklch(49.7%, 0.029, 225.84)

HWB

hwb(198, 31.8%, 56.5%)

Harmony colors

Complementary

#6f5a51

Analogous

#516f69

#51666f

#51576f

Triadic

#51666f

#6f5166

#666f51

Split-complementary

#51666f

#6f5157

#6f6951

Tetradic

#51666f

#5a516f

#6f5a51

#666f51

Square

#51666f

#69516f

#6f5a51

#576f51

Shades

Color #51666f mixed toward black.

#43555c

#36444a

#283337

#1b2225

#0d1112

Tints

Color #51666f mixed toward white.

#67828d

#849ca5

#a3b4bc

#c2cdd2

#e0e6e9

Tones

Color #51666f mixed toward gray.

#53656c

#56646a

#586367

#5b6265

#5d6162

Accessibility

Aa White text on this color

6.03:1

Aa Black text on this color

3.48:1

White text reads better on this background (6.03:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#5b5b6d · ΔE 12.6

Deuteranopia

#5a586c · ΔE 14.2

Tritanopia

#526b6b · ΔE 5.8

Achromatopsia

#636363 · ΔE 9

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

Code

CSS

background-color: #51666f;

Tailwind (arbitrary value)

bg-[#51666f]

Related colors

Sky Blue #87ceeb

Deep Sky Blue #00bfff

Light Blue #add8e6

Light Sky Blue #87cefa

Charcoal #36454f

Steel Blue #4682b4

Frequently asked questions

#51666f (#51666f) is rgb(81, 102, 111) in RGB.

No, #51666f 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.

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 #51666f, or check how it holds up for accessibility.

Generate a palette → Check contrast