Answer:
Weavers used the natural color of sheep's wool or dyed the wool.
Step-by-step explanation:
Navajo’s weavings are considered among the most famous products of Native Americans, and their colorful textiles are worldwide famous.
As soon as Europeans brought domesticated sheep to North America, they have realized they can make quality weaving and started traditionally using wool as the material. They are rising many sheep for their wool to make textiles, rugs, and blankets. At first, the wool they used was the only naturally colored ones, such as white, black, and grey (the mixture). Yet, soon they started coloring it, firstly using the natural colors from the soil and herbs, and later by purchasing pigments from the Spanish.
Their weaving is famous for the geometrical design and rich, earthy tones.