Indigo, in the context of technology, usually refers to Microsoft’s “Windows Communication Foundation (WCF)” released as part of the .NET Framework version 3.0. WCF, previously known as ‘Indigo,’ is a framework for building service-oriented applications, enabling developers to create secure, reliable, and efficient communication between applications and services. It simplifies the development of connected systems by unifying various communication technologies, such as web services, .NET Remoting, and Enterprise Services, under a single programming model.


The phonetic pronunciation of the keyword “Indigo” is: /ˈɪndɪɡoʊ/

Key Takeaways

  1. Indigo is a deep blue-purple color that is one of the seven colors in the visible spectrum, and it lies between blue and violet.
  2. Historically, indigo dye came from the plant Indigofera tinctoria and was used for dyeing textiles, primarily for its rich blue color and colorfastness.
  3. Indigo dye and its production have played a significant role in numerous cultures, leading to its importance in trade and the socio-economic standing of nations, particularly in the context of the Silk Road and the British Empire.


The term “Indigo” is important in technology because it refers to a significant project undertaken by Microsoft in the development of their communication framework.

Indigo, later rebranded as Windows Communication Foundation (WCF), is a part of the .NET framework that enables developers to build secure, reliable, and scalable distributed applications.

WCF unifies various communication technologies such as web services, .NET Remoting, and messaging systems, streamlining development processes, enhancing interoperability, and providing a more efficient way to create service-oriented architectures (SOAs). Thus, Indigo’s relevance emerges from its role as a key milestone in the evolution of communication systems and software development.


Indigo, commonly known as Windows Communication Foundation (WCF), is a framework designed by Microsoft to simplify the development and deployment of distributed applications, primarily on the Windows platform. Developed as a part of the .NET Framework, WCF aims to unify various communication mechanisms that existed before it, such as web services, .NET Remoting, Message Queuing, and Enterprise Services used in Service-Oriented Architecture (SOA). The primary purpose of Indigo is to provide a robust, scalable, and secure platform for building connected software systems that enables seamless communication among applications, services, and devices, regardless of their underlying technologies and communication protocols.

To achieve its purpose, WCF combines multiple communication technologies, allowing applications to be built using a single and consistent programming model. Crucial to the framework is the concept of contracts: defined interfaces between communicating parties that describe data structures, supported features, and communication requirements, which reduce complexity and increase interoperability.

Indigo simplifies communication development significantly as it abstracts various communication details, providing a higher level of consistency, security, and reliability. As a result, it allows developers to focus on business logic and functionality, enabling them to rapidly develop and deploy distributed applications that can easily adapt to evolving communication technologies and environments.

Examples of Indigo

Indigo technology refers to a specific type of digital offset printing technology, developed by Indigo, which is now a division of HP. Indigo digital printing is known for its high quality, flexibility, and ability to print on various materials like paper, plastic, and other synthetic substrates. Here are three real-world examples of Indigo technology:

Self-publishing and Print-on-Demand: Indigo technology has revolutionized the book printing industry by providing authors and small publishers with the opportunity to print small quantities of books cost-effectively. This has given rise to self-publishing platforms like Amazon Kindle Direct Publishing, Lulu, and IngramSpark, which use Indigo presses for their print-on-demand services.

Customized marketing materials: Indigo technology allows for high-quality printing on various materials, making it possible for businesses to produce customized marketing materials such as personalized brochures, flyers, posters, business cards, and more. Indigo presses can print variable data, enabling businesses to tailor each printed piece to different customers or target groups. This has made it popular among marketing and advertising companies.

Short-run packaging: Indigo technology’s ability to print on plastics and synthetic substrates has made it ideal for short-run packaging, particularly for niche and luxury products. This allows brands to create distinct, eye-catching packaging designs that stand out on store shelves and appeal to their target audience. Additionally, Indigo’s ability to handle small print runs means brands can experiment and test-market different packaging designs cost-effectively.

Indigo FAQ

What is indigo?

Indigo is a deep, rich color that sits between blue and violet in the visible light spectrum. It is often associated with wisdom, intuition, and spirituality. The name “indigo” comes from the Greek word “indikon,” meaning “Indian,” as the dye was originally imported from India.

How is indigo dye made?

Indigo dye is made from the leaves of the Indigofera plant, native to the tropics and subtropics. In the traditional process, the leaves are soaked in water and allowed to ferment, after which the liquid is mixed with a base, often lye, to create a soluble compound. This is then mixed with a liquid, like water or oil, to produce the dye.

What are some common uses for indigo?

Indigo has been traditionally used as a dye for textiles and clothing. Today, indigo is still widely used in the textile industry to create shades of blue and is particularly popular in denim production. It is also used as a pigment in inks and paints.

What are some other sources of indigo?

Apart from the Indigofera plant, there are other natural sources of indigo like the woad plant (Isatis tinctoria) found in Europe, and Dyer’s knotweed (Polygonum tinctorum) used in Asia. Synthetic indigo has also been in production since the early 20th century, which is chemically identical to the natural version.

Is indigo related to mood or psychology?

There is no scientific evidence that indigo has any direct psychological effects. However, it is often associated with certain psychological traits, like intuition or wisdom, due to its historical and cultural symbolism. As a deep and calming color, it may evoke feelings of tranquility or spirituality in some people.

Related Technology Terms

  • Color sensors
  • Indigo dye
  • Smart textiles
  • Organic LED (OLED)
  • Wearable technology

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