The families of those who have died in custody have braved the rain to tell their stories and cry out for change.

Donning shirts emblazoned with the faces of loved ones, they marked a National Day of Action to oppose Black Deaths in Custody at Sydney's Town Hall on Saturday.

Kylie Aloua, whose son Jai Wright died after a collision between his trail bike and an unmarked police car, stood with protesters who held posters proclaiming "no justice, no peace" as others took the stage.

The crowd heard from Vickey Fernando, whose partner Stanley Russell was fatally shot by police in 2021, Stolen Generation descendant Gloria Duffin and others.

David Dungay Jr's nephew Paul Silva has spent his life advocating for change and justice since his uncle died after being restrained by police in 2015.

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