1. A method implemented in a system for processing a compressed representation of an image block comprising multiple image elements, said compressed representation comprising at least two color codewords, and said method comprising the steps of: determining, by the system, at least two color values based on said at least two color codewords; for at least one image element in said image block: providing, by the system, color weights assigned to said at least one image element, based only on a position of said image element within said image block, and calculating, by the system, a color representation based on said provided color weights and said determined at least two color values.