The Hopi had limited their designs to striped patterns, but the Navajo introduced geometric shapes, diamonds, lozenges, and zig-zags. Symbolic representations of such phenomena as the elements, the seasons, and the times of day did not develop until about 1820. Mexican design influenced Navajo weaving.

Before 1800, Navajo blankets were largely made of natural-coloured wool—black, white, and a mixture of the two that produced gray; a limited amount of dyeing was done, with roots, herbs, and minerals from the rich soil of the area, primarily producing dark colours, like those of the Hopi. Shortly after the turn of the 19th century, however, red bayeta cloth purchased from the Spaniards was unraveled and the thread used to make Navajo textiles. The introduction of aniline dyes in the late 19th century led to a period in Navajo weaving characterized by bright and even gaudy designs. Vividly coloured yarns were used to weave into the rugs and blankets a broad range of decorative motifs based on commonplace modern objects; representations of automobiles, bottles, tomato cans, and airplanes, for example, found their way into the formerly dignified and restrained fabrics.

More traditional, geometric designs subsequently regained their popularity and are once again the dominant patterns. Weaving remains a vital aspect of contemporary Navajo community life and of its economy.