The new chromatic circle is based on the pigments materiality
and not on physicists's abstract colors.
To obtain the right couple of complementary colors, of the same
tone, it is sufficient to find the opposite colors, equidistant
from center.
Del Drago increased the chromatic range that we use since Newton
until our days, because he has discovered that over the three
primary colors (blue, red and yellow), a fourth one exists: the
mid red.

New Chromatic Circle
The NCC is an important instrument of work for the painters, but
for photographers, cameramen, film directors, artisans, computer
designers too, everyone infact, who uses color.
This subject was the object of a movie product by the RAI, it
is also the object of a long interview for the German television
BAYERISHER Rundfunk and one for the broadcast France Culture in
1994 and 1995.
This chromatic circle was presented by Del Drago in many countries
through lectures given in Spain, France, Italy, Russia, USA, and
at last in China.
Marcella Cossu - National Gallery
of Modem Art in Rome