Use country datasource to draw the map in selected colors
The countries.geojson was taken from:
 - http://openlayers.org/en/v3.0.0/examples/vector-layer.html
 - http://openlayers.org/en/v3.0.0/examples/data/geojson/countries.geojson

but some coordinates are modify from negative to positive in order to keep them on the proper side of the map.
This includes several parts of Russia and some small islands.