Of course the final color choice is yours. it’s your car, right?
If you are interested in reproducing an original MG TD colro shceme, you will find a wealth of info, including paint codes for Dupont, PPG and others at
Former Owner of a 1981 Classic Roadsters Ltd. Duchess (VW)
2005 Intermeccanica Roadster
If you own a TDr and are not in the Registry, please go to https://tdreplica.com/forums/topic/mg-td-replica-registry/ and register (you need to copy and paste the link)