Kitchen - Cover the free space on the top and side with exactly the same color of existing cabinets

Hi, The kitchen in our house is delivered from Sigdal with the standard design. So there is a small space/gap between roof and kitchen cabinets. We need to fix a few additional small cabinets on sides and cover the free space on the top with exactly the same color of existing cabinets. In the provided sketch/drawing, the yellow portion is the space to be filled. Appreciate it if you could revert back with your interest and offer the best quote to perform this work.