In Josef Albers, his idea of color is consolidated in his maturity. The scientific and empirical knowledge of color becomes a living, used as tool, a poetic metric to make them turn up on time perception, activating the subject and making him aware of this activity. The variability, inconstancy of perception; concurrency and reversal of meanings, persecuted since the beginning of his work, strongly reveal in the Homage to the Square series, elaborated in conjunction with the book Interaction of Color. It is from these that his work becomes a paradigm for contemporary art, covering many issues dear to the twentieth century. In both, to problematize the boundaries between theory and practice, rationality and expression posed by bauhausian didactic, culminating the investment of a whole life. This work intends to assert its renewing. We can say can that the thought of color present in his artistic and theoretical oeuvre has not generated a style, but has reached a broad goal of multiplication, training, promoting a clear mind, integrated to the world, in readiness for the future. We intended to forge ahead the discussion of the internal parameters of it in constant clashes and redefinition in synchronic and diachronic dialogue, both with the various public milieus where it has been active, and traditions which is affiliated.