Application of color using Prismacolor pencils

During today's sitting, I was confident enough to start the coloring stage of the Pentagon building. I mainly used 20% and 60% french grays, ginger root and black Prismacolor pencils. I also used Prismacolor Verithin gray and black pencils to define the borders and achieve sharper lines. This is the first time I use them and fine them very hard and perfect for detailing.