About the project


The aim of this work is to conduct a Psychophysical experiment in Spain, Algeria, and Turkey to asses the color emotion for four-colors combinations of the Salubra 1931 color char developed by Le Corbusier. The present website contains a plugin/software that present a total of 312 combinations of the Salubra 1931 to be assessed using the semantic scale Like/dislike.

The study aims to establish a scientific investigation of cross-cultural analysis in 3 universities in Spain, Algeria, and Turkey namely: The Polytechnic University of Valencia, The University Abdelhamid Ibn Badis of Mostaganem, and Kadir Has University. A visual assessment of 312 four colors combinations of the Salubra Colors chart is carried out within a virtual room of the Suisse Pavillion project, that was conceived by Le Corbusier in Paris. The four color combinations are compound of two colors tons and two Valeurs de Fond as it was defined by Le Corbusier. Using a specific plugin/software, we have created an automatic display to generate the 312 combinations of four colors, then we ask the observers to answer the following questions: “how much this color combination is pleasing you?” For each color combination, give your answer by pressing one of the 6 buttons according to the following scale:
-3: Dislike extremely
-2: Dislike moderately
-1: Dislike slightly
±0: Neither Like nor Dislike
+1: Like slightly
+2: Like moderately
+3: Like extremely


Color preferences have been of big significance in architecture and design, especially in the 20th and the 21st centuries. In 1931, the famous architect Le Corbusier developed an original color chart collection for architecture which is completed in 1959 with a second version. Theses color pallets are named “Salubra 1931 ” and “Salubra 1959” They are known as “Les Claviers de Couleur” which means “keyboards of color”. This designation is due to their distribution like the keyboards in a piano.

During many years, several studies have been done to analyze the 1931 Salubra keyboards. The latest one, established by Serra et al. has investigated through the NCS system the combination criteria used in Le Corbusier’s color preferences, such as the combination of colors with equal NCS Chromaticness, the search of some contrast in NCS blackness, or the usual resource of contrasting cool with warm colors…etc. It has been concluded that Le Corbusier used 43 colors with the white color as a background in a minimum ratio between 33 and 50%, whereas the more chromatic colors have to be limited to a ratio between 7.5 and 22%. (2) Salubra colors have to help the understanding of the different pure volumes that make up a building and its hierarchy. (3) The architectural color is often explained by its associative connotations. (4) Plain colors are used and the color gradients are rejected. (5) The colors usually cover the whole surface of the architectonic element.


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