#555b8a

Color #555b8a

A muted medium blue.

Closest named color Steel Blue #4682b4 · ΔE 19.54 Nearest Tailwind class slate-600 #45556c · ΔE 8.7

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Conversions

HEX

#555b8a

RGB

rgb(85, 91, 138)

HSL

hsl(233.2, 23.8%, 43.7%)

HSV / HSB

hsv(233.2, 38.4%, 54.1%)

CMYK

cmyk(38.4%, 34.1%, 0%, 45.9%)

LAB

lab(40, 9.99, -26.86)

LCH

lch(40, 28.66, 290.4)

OKLCH

oklch(48.6%, 0.0758, 277.58)

HWB

hwb(233.2, 33.3%, 45.9%)

Harmony colors

Complementary

#8a8455

Analogous

#55758a

#555b8a

#69558a

Triadic

#555b8a

#8a555b

#5b8a55

Split-complementary

#555b8a

#8a6955

#758a55

Tetradic

#555b8a

#84558a

#8a8455

#5b8a55

Square

#555b8a

#8a5575

#8a8455

#558a69

Shades

Color #555b8a mixed toward black.

#474c73

#393d5c

#2a2d45

#1c1e2e

#0e0f17

Tints

Color #555b8a mixed toward white.

#6b71a4

#898eb6

#a6aac8

#c4c6db

#e1e3ed

Tones

Color #555b8a mixed toward gray.

#595e86

#5e6281

#62657d

#676978

#6b6c74

Accessibility

Aa White text on this color

6.46:1

Aa Black text on this color

3.25:1

White text reads better on this background (6.46:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#585881 · ΔE 2.8

Deuteranopia

#57577e · ΔE 3.3

Tritanopia

#557877 · ΔE 23.9

Achromatopsia

#5e5e5e · ΔE 18.1

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

Code

CSS

background-color: #555b8a;

Tailwind (arbitrary value)

bg-[#555b8a]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#555b8a (#555b8a) is rgb(85, 91, 138) in RGB.

No, #555b8a 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.

Try it → Generators

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 #555b8a, or check how it holds up for accessibility.

Generate a palette → Check contrast