From the pattern preview on the website:

“Brigitte’s surprisingly simple jacket has tons of punch:
from the deeply fluted ribs that impart a wonderful swing shape, to the impact of Gradient Grape
colors marching up the jacket, to the bright accent of green framing the entire picture.
Pick your favorite Gradient, find a great accent color and go!”

Pattern preview: https://www.prismyarn.com/pdf/patterns/Book-90-Preview.pdf