Judith Collins has sparked controversy on Twitter after calling herself a "woman of colour".

The National MP made the comment in relation to a Bill introduced to Parliament to ban female genital mutilation.

"MPs band together for female genital mutilation ban," wrote Collins. "I am a woman of colour - the colour white - and I fully support a ban on this mutilation inflicted on women."

The tweet was deleted fairly quickly, but not before it was saved on the Politwoops website.