At the 2011 Geneva Motor Show, Citroen shows the C3 Red Block and C6 Noir et Blanc, two concepts that play with color combinations and special treatment for the dashboard’s inserts of the two French models. Both cars are concept car, but rumors suggest that sooner or later they will have limited editions. The Citroën C3 Red Block stands for the alloy wheels finishing and the red lower profile of side windows, black headlight housings and for the black contour of the grille …