Persian Blue and Persian Indigo: A Study in Color Variations
The spectrum of blue has long been associated with luxury, history, and artistry. Among its most distinguished variations are Medium Persian Blue and Persian Indigo. While both share a common cultural lineage, they differ significantly in their visual properties, technical coordinates, and historical applications.
Medium Persian Blue
Medium Persian Blue is characterized as a strong blue. In the technical framework of the ISCC-NBS (Inter-Society Color Council-National Bureau of Standards) color list, this specific shade is identified as color sample #178. It represents a balanced, medium-tone blue that is vivid yet stable.
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Technical Specifications
To achieve this exact shade in digital design, specific color coordinates are used. The Hex triplet (a six-digit hexadecimal code used in HTML and CSS) for Medium Persian Blue is #0067A5. In the sRGB color model, which defines colors as a combination of red, green, and blue, it is represented as (0, 103, 165).
Persian Indigo
Persian Indigo is a deeper, more complex shade described as a vivid purplish blue. Its name is derived from the historical association with Persian cloth dyed with indigo, a natural pigment known for its deep intensity.
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The History of Regimental Blue
Historically, Persian Indigo was known as regimental. This name stems from the 19th century, when the color was widely adopted by various nations for navy uniforms. Although the term "regimental" was first recorded as a color name in English in 1912, the shade is seldom used for uniforms in modern times.
Technical Specifications
Persian Indigo possesses a much darker profile than Medium Persian Blue. Its Hex triplet is #32127A, and its sRGB values are (50, 18, 122). In the HSV (Hue, Saturation, Value) model, it sits at a hue of 258°, with 85% saturation and 48% value.
Key Facts
- Medium Persian Blue is classified as a "strong blue" by the ISCC-NBS.
- Persian Indigo is also known as "regimental" due to its use in 19th-century navy uniforms.
- The name Persian Indigo refers to the traditional use of indigo dye on Persian cloth.
- The term "regimental" first appeared in English color nomenclature in 1912.
- Medium Persian Blue is identified as sample #178 in the ISCC-NBS list.
Color Comparison Summary
| Feature | Medium Persian Blue | Persian Indigo |
|---|---|---|
| ISCC-NBS Descriptor | Strong blue | Vivid purplish blue |
| Hex Triplet | #0067A5 | #32127A |
| sRGB Coordinates | (0, 103, 165) | (50, 18, 122) |
| HSV Coordinates | (203°, 100%, 65%) | (258°, 85%, 48%) |
| CIELCh uv | (42, 64, 246°) | (18, 56, 272°) |
Frequently Asked Questions
What is the difference between Medium Persian Blue and Persian Indigo?
Medium Persian Blue is a strong, medium-tone blue, while Persian Indigo is a darker, vivid purplish blue with historical ties to indigo-dyed fabrics.
Why is Persian Indigo called "regimental"?
It is called regimental because it was the standard color used for navy uniforms by many nations during the 19th century.
When was the term "regimental" first used as a color name in English?
The first recorded use of the word regimental as a color name in the English language occurred in 1912.
What is the Hex code for Medium Persian Blue?
The Hex triplet for Medium Persian Blue is #0067A5.
What is the origin of the name Persian Indigo?
The name is derived from the association with Persian cloth that was dyed using indigo.