Si bleu, si calme: The natural cycles of water and air are the underlying ideas of "Si bleu, si calme": condensation and evaporation, winds and currents. "Bleu" (blue) stands for the elements air and water, and "Calme" (calm) refers to space and silence. In musical terms, the complex "Bleu" tends toward development and growing complexity, while "Calme" works on the simplification of intervals and rhythmical figures.