1. A method for a hybrid of proximity and identity similarity based deduplication in a data deduplication system using a processor device in a computing environment, comprising: comparing color intensity for additional classification enhancement of colored files grouped together by file coloring where a preferred character is represented for the file coloring using a code selected from a plurality of codes that represent a plurality of contexts, wherein an original meaning of the preferred character is retained when representing the preferred character for the file coloring by the code selected from the plurality of codes.