Prussian Blue

#013256

General Information about Prussian Blue

Prussian Blue, represented by the hex code #013256, is a dark shade of blue that was originally produced as a pigment. Chemically, it's a complex iron cyanide compound with the formula Fe7(CN)18. It's notable for its intense color and was widely used in painting, dyeing, and printing. Historically, Prussian Blue was discovered accidentally in the early 18th century and quickly became a popular alternative to more expensive blue pigments like ultramarine, which was derived from lapis lazuli. It is a very stable pigment with good lightfastness, making it suitable for various applications. In digital contexts, it is commonly employed to convey feelings of trust, professionalism, and calmness. However, due to its darkness, its use requires attention to contrast ratios to ensure accessibility.

The hex color #013256, a deep shade of Prussian Blue, presents some accessibility challenges, especially when used for text. Due to its low lightness value, it requires careful consideration of contrast ratios. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text against its background to ensure readability for users with visual impairments. When using #013256 for text, it is crucial to pair it with a very light color for the background, such as white (#FFFFFF) or a light gray, to achieve sufficient contrast. Tools like WebAIM's contrast checker can be used to assess the contrast ratio and ensure compliance with accessibility standards. Avoid using #013256 for small text or important visual elements without proper contrast, as this can exclude users with low vision or color blindness. Furthermore, always provide alternative ways to convey information, such as using icons or descriptive text, in addition to color.

Shades

Digital Color Formats

RGB
1 50 86
RGB1 50 86
Red
Green
Blue
HSL
205.41deg 97.7% 17.06%
205.4197.717.06HSL
Hue
Saturation
Lightness
HWB
205.41deg 0.39% 66.27%
205.410.3966.27HWB
Hue
Whiteness
Blackness
hex#013256
rgb1 50 86
hsl205.41deg 97.7% 17.06%
cmyk98.84% 41.86% 0% 66.27%
hwb205.41deg 0.39% 66.27%
xyz-d650.03 0.03 0.09
oklch0.3087 0.0806 247.25
oklab0.3087 -0.03 -0.07
CMYK
98.84% 41.86% 0% 66.27%
98.8441.86066.27CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.03 0.03 0.09
0.030.030.09XYZ
X
Y
Z
OKLCH
0.3087 0.0806 247.25
0.30870.0806247.25LCH
Lightness
Chroma
Hue
OKLAB
0.3087 -0.03 -0.07
0.3087-0.03-0.07LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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