Here are some sketches on tan paper, from several years ago. Using black ink and a white Prismacolor pencil (or white gel pen) works well to create highlights and shiny bits. I apologize to my students for the symmetry of the sketch with a fountain! I keep telling them that “symmetry is for sissies!”
I prefer to omit color and stick with black and white. The color of the paper provides the mid-tones. I added the Strathmore Toned Tan sketchbook 5.5 x 8.5 inches to my materials list for workshop students.