#555a66

Color #555a66

A nearly neutral, gray-leaning dark blue.

Closest named color Dim Gray #696969 · ΔE 9.8 Nearest Tailwind class gray-600 #4a5565 · ΔE 3.4

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

Conversions

HEX

#555a66

RGB

rgb(85, 90, 102)

HSL

hsl(222.4, 9.1%, 36.7%)

HSV / HSB

hsv(222.4, 16.7%, 40%)

CMYK

cmyk(16.7%, 11.8%, 0%, 60%)

LAB

lab(38.2, 0.82, -7.54)

LCH

lch(38.2, 7.58, 276.21)

OKLCH

oklch(46.8%, 0.0204, 267.47)

HWB

hwb(222.4, 33.3%, 60%)

Harmony colors

Complementary

#666155

Analogous

#556366

#555a66

#595566

Triadic

#555a66

#66555a

#5a6655

Split-complementary

#555a66

#665955

#636655

Tetradic

#555a66

#615566

#666155

#5a6655

Square

#555a66

#665563

#666155

#556659

Shades

Color #555a66 mixed toward black.

#474b55

#393c44

#2b2d33

#1c1e22

#0e0f11

Tints

Color #555a66 mixed toward white.

#6e7483

#8a8f9d

#a7abb6

#c4c7ce

#e2e3e7

Tones

Color #555a66 mixed toward gray.

#565b65

#585b63

#595c62

#5b5c60

#5c5d5f

Accessibility

Aa White text on this color

6.91:1

Aa Black text on this color

3.04:1

White text reads better on this background (6.91:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#575763 · ΔE 2.8

Deuteranopia

#575763 · ΔE 2.8

Tritanopia

#556161 · ΔE 8.7

Achromatopsia

#5a5a5a · ΔE 6.5

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

Code

CSS

background-color: #555a66;

Tailwind (arbitrary value)

bg-[#555a66]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#555a66 (#555a66) is rgb(85, 90, 102) in RGB.

No, #555a66 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 #555a66, or check how it holds up for accessibility.

Generate a palette → Check contrast