Central Organization of Trade Unions,  has asked Maendeleo Chap Chap Movement to stop using  purple colour saying it's the union's official logo.

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In a demand letter addressed to Governor Alfred Mutua and the Registrar of Political Parties on Friday, the workers' union said the whole event was a sea of purple, colour only associated with Cotu.

"Cotu has given him seven days to stop using the colour," the union's lawyer Samuel Aduda said.

This comes a day after Mutua launched his Maendeleo Chap Chap Party at the Bomas of Kenya on Thursday where Wiper members have condemned him for launching the movement saying he wrongfully took credit for the fruits of devolution.