swatch (n.)youdaoicibaDictYouDict[swatch 词源字典]
1510s, "the countercheck of a tally" (Northumberland dialect), later "a tally attached to cloth sent to be dyed" (1610s, in Yorkshire), of unknown origin. Century Dictionary compares swath. Meaning "a sample piece of cloth" is from 1640s.[swatch etymology, swatch origin, 英语词源]