I am not quite sure why this is called the Colourblock bag. It's just black and white but it is fab. You will have to cross the pond to get it. Available at Karen Millen. [POST UPDATE: Karen Millen now ships to the U.S. Just click on the Union Jack next to "SALE" and a drop-down menu will allow you to choose the US site. But this fab bag is now sold out! Sorry.]