Scientists in Chicago have produced a visualisation of van Gogh's Bedroom in Arles, showing what it would have looked like before its colours faded.
The artist painted three versions of this famous scene, using broadly the same colour scheme.
But time and light degradation have taken their toll on the pigments.
Using a variety of techniques, the researchers have digitally restored the light blue walls and door to their original lilac and purple
http://www.bbc.co.uk/news/science-environment-35576268