The episode, broadcast in August, saw Eva Price, played by Catherine Tyldesley, visit Audrey’s hair salon, where she remarked about her dyed hair: “I have more roots than Kunta Kinte.
“No idea who that is, by the way, just something my mum used to say.”
The comments, which led Coronation Street to ‘apologise if this dialogue has caused offence’, sparked 473 complaints to media watchdog Ofcom.
Kunta Kinte was a character from the novel Roots: The Saga Of An American Family, which was adapted into a hit TV miniseries.
Based on a real-life ancestor of author Alex Haley, it tells the story of a young man taken from Gambia and sold as a slave.
But Ofcom said the episode, which screened in August, did not breach the broadcasting code.
ITV said Eva Price’s light-hearted play on the word ‘roots’ was both a reference to her dyed blonde hair needing to be retouched and the title of the US historical drama, Roots.
It said that as Eva used the comment without understanding its meaning, this reflected ‘her slightly foolish and shallow character’.
An Ofcom spokesman said: “We recognised that the character’s comment caused offence to some viewers. There is a long history on British television of soap characters behaving controversially and in ways that develop their characters.
“In this case, the character said that she did not understand the meaning of her comment, which served to illustrate her naivety. Therefore, on this occasion we found that the comment was justified by its context.”