It happens that the new facade of the "Instituto Nacional de Estadística" building (the spanish demographics stats bureau), which emerged as a result from the comprehensive refurbish held by architect César Ruiz Larrea during the last couple of years, has some sort of hidden simphony beneath its walls, which is written with colors and numbers. It has been called "Diafragma Decafónico de Dígitos" and was authored by sculptor Cruz Novillo.
Each color represents a number (1 is red, 2 is for orange, 3 for light green, 4 is pink, 5 for yellow, 6 for dark green, 7 for purple, 8 for blue and finally 9 for skyblue and/or brown), and also each color has it's own particular sound, as well (red is C, orange is D bemol / C sustained, light green is D, pink is E bemol / D sustained, yellow is E, green is F, purple is G bemol / F sustained, blue is G, skyblue is A bemol / G sustained and brown B). Then colors have been randomly sepparated by 58 different demographic facts pulled from the spanish reality at the time of reconstruction.
The objective of the entire project was, supposedly, to reflect the existig differences on the spanish demographics universe and how these affect and define the culture of the entire country. Also being able to perceive a single art piece (a building in this case) through different senses.
Sculpture meets music, then music meets color, then color meets maths, then maths meets architecture, then architecture meets sculpture, and so on...