#0558a1

Color #0558a1

A vivid, highly saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 20.25 Nearest Tailwind class sky-800 #00598a · ΔE 4.3

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

Conversions

HEX

#0558a1

RGB

rgb(5, 88, 161)

HSL

hsl(208.1, 94%, 32.5%)

HSV / HSB

hsv(208.1, 96.9%, 63.1%)

CMYK

cmyk(96.9%, 45.3%, 0%, 36.9%)

LAB

lab(37.08, 7.1, -45.52)

LCH

lch(37.08, 46.07, 278.87)

OKLCH

oklch(45.9%, 0.1371, 252.6)

HWB

hwb(208.1, 2%, 36.9%)

Harmony colors

Complementary

#a14e05

Analogous

#05a19c

#0558a1

#050aa1

Triadic

#0558a1

#a10558

#58a105

Split-complementary

#0558a1

#a1050a

#a19c05

Tetradic

#0558a1

#4e05a1

#a14e05

#58a105

Square

#0558a1

#9c05a1

#a14e05

#0aa105

Shades

Color #0558a1 mixed toward black.

#044986

#033b6b

#022c50

#021d36

#010f1b

Tints

Color #0558a1 mixed toward white.

#0776d8

#2093f8

#58aefa

#90c9fc

#c7e4fd

Tones

Color #0558a1 mixed toward gray.

#125794

#1f5687

#2c557a

#39556d

#465460

Accessibility

Aa White text on this color

7.2:1

Aa Black text on this color

2.92:1

White text reads better on this background (7.2:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3b3b93 · ΔE 13.5

Deuteranopia

#373190 · ΔE 16

Tritanopia

#138885 · ΔE 30.2

Achromatopsia

#575757 · ΔE 22.7

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

Code

CSS

background-color: #0558a1;

Tailwind (arbitrary value)

bg-[#0558a1]

Related colors

Alice Blue #f0f8ff

Steel Blue #4682b4

Dodger Blue #1e90ff

Light Slate Gray #778899

Slate Gray #708090

Charcoal #36454f

Frequently asked questions

#0558a1 (#0558a1) is rgb(5, 88, 161) in RGB.

No, #0558a1 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.

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 #0558a1, or check how it holds up for accessibility.

Generate a palette → Check contrast