Love the new chairs! We think the fabric you choose will depend on the feeling you want in your room. Yellow would look great with the lucite back of these chairs, and will provide a high contrast with your red Panton chairs if that is the look you are hoping to achieve. A bamboo cane pattern would not be our top choice with the lines of that chair; we would recommend a more abstract pattern if you want a pattern.
Do our talented readers have any fabric recommendations for Carlos?