566 (brand)

566 is a Taiwanese hair care brand best known for its shampoo products. Introduced in 1973 by the Nice Group, the brand is widely regarded as one of Taiwan's longest-running domestic shampoo brands and played a significant role in the transition of Taiwan's hair-care market from powders and soaps to liquid shampoos during the 1970s and 1980s.

The brand name "566" is commonly interpreted as a phonetic reference to the Mandarin phrase "wū liōu liōu" (烏溜溜), meaning "jet black and shiny", reflecting traditional East Asian beauty ideals associated with healthy hair.

566 is frequently cited in Taiwanese popular culture as a representative example of postwar domestic consumer brands. Early advertising campaigns are noted for blending Western-style aesthetics with local cultural references, contributing to the normalization of shampoo use in everyday life. Scholars of Taiwanese media and advertising history have identified 566 as part of a broader shift toward television-driven brand building in the 1970s, a period that coincided with rising household incomes and expanding consumer culture.