The fire performance of colored taffeta with a silver coating depends on a variety of factors, such as the specific composition of the material, the thickness of the fabric, and the presence of any additional treatments or coatings. In general, taffeta is a lightweight, tightly woven fabric, usually made from silk or synthetic fibers such as polyester.

In terms of fire performance, synthetic fibers such as polyester are generally considered to be more resistant to ignition and flame spread than natural fibers such as silk. However, adding a silver coating to taffeta may affect its fire performance.

The silver coating enhances the thermal performance of the fabric. However, if the silver coating is applied in a way that reduces the fabric's breathability or increases its flammability, the fire performance of the taffeta may be compromised.

It's worth noting that the fire performance of any fabric can be improved by treating it with flame retardant chemicals or coatings. These treatments work by preventing the fabric from catching fire or slowing the rate of flame spread if the fabric catches fire.