Prussian Blue Color Code: #004577, RGB & HSL

Prussian Blue color values

HEX #004577

RGB rgb(0, 69, 119)

HSL hsl(205, 100%, 23%)

HSV 205, 100%, 47%

HWB hwb(205 0% 53%)

CMYK 100%, 42%, 0%, 53%

Decimal 17783

23%HSL lightness (dark)

100%HSL saturation (vivid)

205°Hue angle (azure)

0.056Relative luminance

CMYK is a standard screen-to-print conversion. Printed results depend on inks, paper and color profiles.

What is Prussian Blue?

“Prussian Blue” is a crowd-sourced name from the XKCD Color Survey, in which participants typed names for colors they were shown. It is a popular everyday label rather than an official standard.

Its hue angle of 205° places it in the azure part of the color wheel, with 100% saturation (vivid) and 23% lightness (dark). It is a cool color.

Compared with the other blue colors in the Aqeeb Studio library, it is lighter than 7% of them and more saturated than 87% of them.

Its relative luminance is 0.056, which makes it a dark color. That is below the 0.179 crossover point at which black and white text have equal contrast, so white text has the advantage.

Prussian Blue counts as a dark color: its HSL lightness is 23% and its relative luminance is 0.056. White text reads comfortably on it (9.91:1 contrast).

Text contrast on Prussian Blue

WCAG contrast of white and black text on Prussian Blue
Text	Preview	Ratio	AA normal	AA large	AAA normal	AAA large
White text	Sample text	9.91:1 Excellent	Pass	Pass	Pass	Pass
Black text	Sample text	2.11:1 Poor	Fail	Fail	Fail	Fail

Ratios use the WCAG 2 formula and are truncated, never rounded up. Test any pair with the contrast checker.

Colors that go with Prussian Blue

Complementary color

Complementary colors sit directly opposite each other on the color wheel (180° apart). They give the strongest hue contrast, which suits calls to action and accents.

≈ Chestnut#773200

Analogous colors

Analogous colors are neighbors on the wheel, 30° either side of the base hue. They blend smoothly and are easy to combine in backgrounds, gradients and illustrations.

≈ Blue Green#00776E ≈ Deep Blue#000977

Triadic colors

A triadic scheme uses three hues spaced 120° apart. It is lively yet balanced, and works best when one color leads and the other two act as accents.

≈ Red Purple#770045 ≈ Sap Green#457700

Split-complementary colors

Split-complementary keeps the base color and uses the two colors on either side of its complement (150° and 210°). The contrast is strong but gentler than a direct complement.

≈ Blood#770009 ≈ Brown Green#776E00

Tetradic colors

A tetradic (rectangle) scheme combines two complementary pairs at 0°, 60°, 180° and 240°. It offers variety but needs one dominant color to stay balanced.

≈ Indigo#320077 ≈ Chestnut#773200 ≈ Sap Green#457700

Monochromatic variants

Monochromatic variants keep the same hue and saturation and only change lightness, which makes them dependable for UI scales and subtle layered designs.

#00121F#00121F

#003B66#003B66

#0065AD#0065AD

#008EF5#008EF5

#3DAEFF#3DAEFF

A “≈” before a name means the exact harmony color has no named match, so the link goes to the closest named color.

Tints and shades of Prussian Blue

Lighter tints (mixed with white)

Darker shades (mixed with black)

Select any swatch to copy its HEX code. Build longer scales with the tints and shades tool.

Twilight Blue#0A437A Light Navy#155084 Marine Blue#01386A Deep Sea Blue#015482 Dusk Blue#26538D Light Navy Blue#2E5A88 Marine#042E60 Denim Blue#3B5B92

Where to use Prussian Blue

Button, banner and badge backgrounds with white text (9.91:1 contrast)
Links, buttons and primary interface accents
Corporate, finance and software branding
Headers and navigation bars
Charts and dashboards

Use Prussian Blue in CSS

:root {
  --color-prussian-blue: #004577;
}

.element {
  color: var(--color-prussian-blue);
  background-color: #004577;
  border: 2px solid #004577;
}

Questions about Prussian Blue

What is the HEX code for Prussian Blue?

Prussian Blue is #004577.

What is the RGB value of Prussian Blue?

The RGB value of Prussian Blue is 0, 69, 119: 0 red, 69 green and 119 blue on a 0–255 scale, written rgb(0, 69, 119) in CSS.

What is the HSL value of Prussian Blue?

The HSL value of Prussian Blue is 205°, 100%, 23% (hue, saturation, lightness), written hsl(205, 100%, 23%) in CSS.

What is the CMYK value of Prussian Blue?

A standard conversion gives about C 100%, M 42%, Y 0%, K 53%. Real print results depend on the inks, paper and color profile, so treat CMYK here as a reference value.

Is Prussian Blue a light or dark color?

Prussian Blue counts as a dark color: its HSL lightness is 23% and its relative luminance is 0.056. White text reads comfortably on it (9.91:1 contrast).

How does Prussian Blue look with white text?

White text on Prussian Blue has a contrast ratio of 9.91:1, rated Excellent. It meets WCAG AA for normal text.

How does Prussian Blue look with black text?

Black text on Prussian Blue has a contrast ratio of 2.11:1, rated Poor. It falls below the WCAG minimum for text.

What colors go well with Prussian Blue?

Chestnut is its complementary color, and Blue Green sits beside it as an analogous color. Lighter and darker variants of the same hue also work well for monochromatic palettes.

Where can Prussian Blue be used?

It suits button, banner and badge backgrounds with white text (9.91:1 contrast); links, buttons and primary interface accents; corporate, finance and software branding.

How do I use Prussian Blue in CSS?

Use color: #004577; for text, background-color: #004577; for fills, or define a custom property such as --color-prussian-blue: #004577; and reuse it with var(--color-prussian-blue).

About this color page

Crowd-sourced name from the XKCD Color Survey (CC0). Values are calculated from the HEX code; color names are labels, not trademarks or standards unless stated. Screens render colors differently, so always check important colors on your own device. See the disclaimer.

Prussian Blue Color Code: #004577