We've already had the dress debate this year (is it gold and white or blue and black?) but now a new confusingly coloured garment is taking Twitter by storm and Nicola Sturgeon is at the centre of the discussion.

Twitter users were left confused by the First Minister's challengers debate ensemble and its apparent ability to change colour.

In photographs taken ahead of the debate the dress seemed to be blue, however, during the event it looked grey and photographs of it in national papers this morning appear to show it as green and turquoise

Some social media users were so confused by the garment that they tweeted Question Time to ask why it seemed to have changed colour.

Some Twitter users also claimed that Sturgeon's dress was the same colour as Ed Miliband's tie.

However, others were more interested in the FM's shoes.