Rosmah Mansor, the wife of former premier Najib Abdul Razak, has seemingly joined the opposition-led campaign for critics to don all-black outfits in protest of Pakatan Harapan's first year in power.

Umno supreme council member Lokman Noor Adam posted pictures on his Instagram account, which showed Rosmah attending a Quran recital ceremony today clad in a black tudung and baju kurung.

According to Lokman, Rosmah has held the recital ceremony with her friends for the past 14 years, with the exception of only last year.

Meanwhile, Lokman led a group of about 30 people, all clad in black, in a walkabout at the Mid Valley Megamall in Kuala Lumpur today.

The campaign, dubbed "Black 905" was a sign of protest against Pakatan Harapan's victory in the last general election.

The group started gathering at the mall's entrance about 6pm, before starting their walkabout inside the mall.

After loitering for about an hour, the participants then gathered for a buka puasa (breaking of fast) session.