Comment: Least likely to change

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Least likely to change

The expression "dyed in the wool" comes from the fact that fabric can be dyed in a number of ways. Wool fabric can be dyed after it is woven, or the threads can be dyed before they are woven. When a color is "dyed in the wool," the wool itself is dyed before being spun into threads, so the colour is least likely to fade or change.