We report a study of the acquisition of colour terms by speakers of Se
tswana, the language of Botswana in Southern Africa. This was carried
out as a test of Berlin and Kay's theory of colour term universals, on
a language with less than the maximum complement of eleven basic colo
ur terms, and in order to document changes in Setswana under the impac
t of economic development. Seventy-seven five- to nine-year-olds were
studied on two colour tasks: elicited lists and colour naming. In gene
ral the data were consistent with Berlin and Kay's theory: the rank or
der of frequency of correct use of colour terms was similar to the ord
er of the Berlin and Kay hierarchy; and primary colour terms were offe
red more frequently and were more likely to be used correctly than sec
ondary colour terms. The use of English colour terms was prevalent, es
pecially amongst the younger groups, but they functioned as substitute
s for Setswana terms, rather than as a means to fill the vacant basic
colour term slots.