The Democratic Alliance (DA) and Western Cape Premier Helen Zille have reached a settlement over her controversial remarks about colonialism.

Zille is expected to apologise unreservedly to the nation at a media conference in Johannesburg at 10:30 on Tuesday.

She will remain as premier of the Western Cape, but will no longer participate in any DA activity.

Zille will address the nation with DA leader Mmusi Maimane by her side.