Tie-dye

Tie-dye is a process of resist dyeing textiles or clothing which is made from knit or woven fabric, usually cotton; typically using bright colors. It is a modern version of traditional dyeing methods used in many cultures throughout the world. 

"Tie-dye" can also describe the resulting pattern or an item which features this pattern. Tie-dyeing became fashionable in the West in the late 1960s and early 1970s as part of hippie style. It was popularized in the United States by musicians such as John Sebastian, Janis Joplin, The Grateful Dead and Joe Cocker.

Tie-dyed bandanas, or neckerchiefs, are probably the most uniform piece of clothing among people detesting uniforms.