International audience The aim of this paper is to build a user profile according to his own perception. We focus on the dynamic construction of the profile, which will increase the satisfaction of the user by being more personalized and accommodated to his particular needs. We suggest two methods to define the perception and transform it into a profile; the first method is achieved by querying the user and getting answers, which will guide through the process of implementation of the profile; the second method is achieved by comparing different subjects and ending up by an appropriate choice. As a case study, we took the example of color perception. We rely on fuzzy logic to represent the different aspects of color and to formulate the questions and answers.