#173a79

Color #173a79

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 15.03 Nearest Tailwind class blue-900 #1c398e · ΔE 3.8

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Conversions

HEX

#173a79

RGB

rgb(23, 58, 121)

HSL

hsl(218.6, 68.1%, 28.2%)

HSV / HSB

hsv(218.6, 81%, 47.5%)

CMYK

cmyk(81%, 52.1%, 0%, 52.5%)

LAB

lab(25.53, 12.22, -39.55)

LCH

lch(25.53, 41.39, 287.17)

OKLCH

oklch(36.2%, 0.1152, 261.06)

HWB

hwb(218.6, 9%, 52.5%)

Harmony colors

Complementary

#795617

Analogous

#176b79

#173a79

#251779

Triadic

#173a79

#79173a

#3a7917

Split-complementary

#173a79

#792517

#6b7917

Tetradic

#173a79

#561779

#795617

#3a7917

Square

#173a79

#79176b

#795617

#177925

Shades

Color #173a79 mixed toward black.

#133065

#0f2751

#0b1d3c

#081328

#040a14

Tints

Color #173a79 mixed toward white.

#2152ac

#326dd8

#6592e2

#98b6ec

#ccdbf5

Tones

Color #173a79 mixed toward gray.

#1f3c71

#273f69

#2f4160

#384358

#404650

Accessibility

Aa White text on this color

10.95:1

Aa Black text on this color

1.92:1

White text reads better on this background (10.95:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2a2a6e · ΔE 7.4

Deuteranopia

#28256b · ΔE 8.7

Tritanopia

#1a6461 · ΔE 28.5

Achromatopsia

#3c3c3c · ΔE 21.7

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

Code

CSS

background-color: #173a79;

Tailwind (arbitrary value)

bg-[#173a79]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Royal Blue #4169e1

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#173a79 (#173a79) is rgb(23, 58, 121) in RGB.

No, #173a79 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 #173a79, or check how it holds up for accessibility.

Generate a palette → Check contrast