Smarties come in eight colours: red, orange, yellow, green, mauve (or purple), pink, brown and white in the UK. In the original range of colours, there was a light-brown Smartie. This was replaced in 1988 with the blue Smartie. Before 1958, the dark-brown Smarties had a plain-chocolate centre, while the light-brown one tasted of coffee. The orange Smarties contained, and still contain, orange-flavoured chocolate. In 2006 it was announced that Nestle were removing all artificial colours from Smarties in the UK, owing to concerns over chemical dyes producing hyperactivity in children. In answer to this controversy, Nestle decided to replace all chemical dyes with natural ones. As they were unable to source a natural blue dye, blue Smarties were replaced with white. As of 2007, Nestle Smarties in the UK contain blue Smarties again.