About Prussian Blue
Prussian Blue is the hex color #003153, which translates to rgb(0, 49, 83) in RGB and hsl(205, 100%, 16%) in HSL. On the color wheel it sits at 205 degrees, with a saturation of 100 percent and a lightness of 16 percent. That is deep enough that Prussian Blue reads almost as an ink: it carries detail poorly but anchors a layout well.
How Prussian Blue compares
The closest standard CSS keyword is darkslategray (#2F4F4F), a CIE76 distance of 26.8 away in CIELAB. That is a visible difference, so the keyword is not a substitute here. In the Tailwind CSS 4.3.1 palette the nearest token is sky-950 (#052F4A), at a distance of 4.9. Inside this library the closest neighbour is Charcoal at 19.4. Sorted by lightness, Prussian Blue is number 1 of the 30 blue colors here.
Text on Prussian Blue
2 of the five common text colors below clear WCAG AA for normal text on Prussian Blue, led by White at 13.43:1. The ratios are computed with the WCAG relative luminance formula, the same one the contrast checker uses, which opens with Prussian Blue already loaded as the background.
| Text color | Ratio | AA normal | AA large | AAA normal |
|---|---|---|---|---|
| White #FFFFFF | 13.43:1 | Pass | Pass | Pass |
| Ink black #0F0F12 | 1.43:1 | Fail | Fail | Fail |
| Mid grey #6B7280 | 2.78:1 | Fail | Fail | Fail |
| Dark grey #374151 | 1.30:1 | Fail | Fail | Fail |
| Light grey #E5E7EB | 10.84:1 | Pass | Pass | Pass |
Building a palette around Prussian Blue
The pairings above give you three classic starting points. The complementary color sits opposite on the wheel and works well as an accent that draws the eye. The analogous colors sit right beside Prussian Blue for calmer, harmonious combinations. The triadic pair spaces three hues evenly for a balanced, energetic palette. Open any swatch to explore it as its own color, or open the palette generator with Prussian Blue locked and let it fill in the rest.
Full values for Prussian Blue
| Format | Value |
|---|---|
| HEX | #003153 |
| RGB | rgb(0, 49, 83) |
| HSL | hsl(205, 100%, 16%) |
| HSV | hsv(205, 100%, 33%) |
| CMYK | cmyk(100%, 41%, 0%, 67%) |
| OKLCH | oklch(30.35% 0.0779 245.92) |
| CIELAB | lab(19.31 -0.42 -24.88) |
Frequently asked questions
What is the RGB value of Prussian Blue?
Prussian Blue (#003153) is rgb(0, 49, 83): 0 red, 49 green and 83 blue on the 0 to 255 scale. Blue leads at 83, green follows at 49 and red trails at 0, which puts the hue at 205 degrees. In HSL the same color is hsl(205, 100%, 16%).
What colour is #003153?
#003153 is Prussian Blue, a very dark blue colour with a hue of 205 degrees, 100% saturation and 16% lightness. For print the CMYK breakdown is 100% cyan, 41% magenta, 0% yellow and 67% black. Its nearest neighbour in this library is Charcoal, 19.4 away in CIELAB, a difference you can see.
Is Prussian Blue a CSS color name?
No. Prussian Blue is not one of the 148 CSS named colors, so write it as #003153. The nearest keyword is darkslategray (#2F4F4F), a CIE76 distance of 26.8: far enough that the keyword reads as a different color.
What colors go with Prussian Blue?
Opposite Prussian Blue on the color wheel sits the complementary #532200, the boldest accent by hue. For a calmer scheme use the analogous neighbours #00534B and #000753; for a balanced three-color scheme use the triadic pair #530031 and #315300. Of these, #315300 has the most contrast against Prussian Blue, at 1.51:1, so pair it by hue, not for legibility.
What text color is readable on Prussian Blue?
White (#FFFFFF) is the most readable on Prussian Blue, at 13.43:1, which also clears WCAG AAA (7:1). 2 of the 5 common text colors tested pass AA for normal text.
Use Prussian Blue in a tool
Nearby colors
Last updated by FusionStudios. Every value on this page is computed by the same functions the tools use. How this is calculated.