From Longman Dictionary of Contemporary Englishoff-whiteˌoff-ˈwhite noun [uncountable] CCa white colour that has some yellow or grey in it —off-white adjective an off-white blouse
Examples from the Corpus
off-white• The walls were beige up to about waist level, then turned off-white.• My uncle did it once-both ways-only it was off-white with stripes.• The buildings were off-white and decorated in once-bright yellows, reds, oranges, and blues. 