Crewel embroidery, or crewelwork, is a type of surface embroidery using wool. A wide variety of different embroidery stitches are used to follow a design outline applied to the fabric. The technique is at least a thousand years old.[citation needed]

Crewel embroidery is not identified with particular styles of designs, but rather is embroidery with the use of this wool thread.[1]: 102  Modern crewel wool is a fine, two-ply or one-ply yarn available in many different colours. Crewel embroidery is often associated with England in the 17th and 18th centuries, and from England was carried to the American colonies. It was particularly popular in New England. The stitches and designs used in America were simpler and more economical with the scarce crewel wool. The Deerfield Society of Blue and White Needlework (1896–1926) revived interest in crewel embroidery in the United States.

https://en.m.wikipedia.org/wiki/Crewel_embroidery

The embroidery is a fundamental element of the Ukrainian folk costume in both sexes.[11]: 16  Ukrainian vyshyvanka is distinguished by local embroidery features specific to Ukrainian embroidery:

The vyshyvanka not only speaks of its Ukrainian origin but also of the particular region in which it was made. The knowing eye could detect where a person hailed from by the clothes on their back. Embroidery is thus an important craft within Ukraine and different techniques exist to suit local styles with their own particular patterns and colours. Traditionally, the thread was coloured according to local formulas using bark, leaves, flowers, berries and so on. In this way, the local environment is literally reflected in the colour of the embroidery.

— JJ Gurga, Echoes of the Past: Ukrainian Poetic Cinema and the Experiential Ethnographic Mode[3]

In Ukrainian embroidery, black, red, and white colours are basic, and yellow, blue, and green are supplementary.[11]: 278 

On the territory of Ukraine, embroidery existed already in the 5th century B.C, and was a creation of Scythian fine art.[11]: 18  Ukraine is famous throughout the world for its highly artistic embroidery.[11]: 16  It is important for the embroiderer today to use folk art as a source without altering stitches or colours because every change devalues a piece of embroidery and distorts it.[11]: 278 

https://en.m.wikipedia.org/wiki/Vyshyvanka#:~:text=The%20vyshyvanka%20not%20only%20speaks%20of