Why is Denim Blue, The Power of Indigo Dye

Maybe I just think into things too much, but when you realize that over 85% of all jeans sold and worn are blue, the question “Why is denim blue?” came to mind.

My first thought was dye as it would be yours, but I was interested in the process. Like where the fabric comes from and how it ends up as a pair of jeans.

Jeans come in almost all colors, but I want to talk about the popular type, and let you know why denim is Blue.

Why is Denim Blue?

The Origins of Denim’s Iconic Blue Hue:

As we are starting from the beginning, the word “Denim” comes from the French town ‘De Nimes’ where Denim started its journey back in the 17th century.

They would weave together the strong cotton twill fabrics, then color them with a natural dye derived from the leaves of the Indigofera plant. This dying technique was already used in other parts of the world and the color blue symbolized strength and spirituality.

I’m not sure if the French had the same idea, or they used the plant out of proximity and ease of access. But, this is why the majority of denim is blue.

Indigo Dye and Denim:

As denim gained popularity and it was being used more, you have more data. So men that were working rugged jobs like in the mines and construction realized that denim was very resistant, the the indigo dye would adhere to the cotton fabrics really well.

To this day, they still find Levi’s jeans buried under rubble in old mines, and they can restore and even wear them. So another reason for “why is denim blue?” is becuase that particular dye and color adhere really well and last for extremely long periods of time.

The dye is so strong and permanent becuase of a chemical process taking place when dying the jeans. When the dye is introduced to the denim, in the water it looks green. As soon as you take it out the water, the dye oxidizes and solidifies into the blue color we know and adheres permanently to the fabric.

FAQ

Why is denim blue?
Indigo, a natural dye derived from indigofera plant leaves.

Does denim always have to be blue?
Denim comes in almost all colors, blue is just the safest and longest lasting color.

Does the blue color of denim fade over time?
Yes, the blue color of denim tends to fade with wear and wash, giving it a distinct “vintage” or “worn-in” look.

What is the significance of denim’s blue hue in fashion?
Denim’s blue hue carries historical significance and symbolizes versatility, rebellion, and timeless style.

Can denim be sustainably dyed using indigo?
Yes, this way of dying is a natural and eco friendly method.

How can I preserve the blue color of my denim garments?
To preserve the blue color of your denim, wash them inside out in cold water, avoid excessive washing, and use mild detergent.

Additionally, hanging denim to dry instead of using a dryer can help maintain the color vibrancy.