The page Barry posted is from the "crash parts" book.
The '70-'71 Part Catalog shows:
(There must've been some discussion on color names. I've added in RED the official '71 Plymouth names for clarity).

7-16-0 Radiator Grill
7-16-11 Grill
-- B-S '71 Pntd. FJ6 Avacado 3573 611 "sassy grass green"
-- B-S '71 Pntd. GY3 Citron Yella 3573 612 "curious yellow"
-- B-S '71 Pntd. FC7 Plum Met. 3573 613 "in-violet metallic"
-- B-S '71 Pntd. GW3 Bright White 3443 587 "sno-white"
-- B-S '71 Pntd. EV2 Tor Red 3443 589 "tor-red metallic"
-- B-S '71 Pntd. GB5 Bright Blue 3443 593 "true blue metallic"
-- B-S '71 Pntd. GF7 Med. Yellow Green Met. 3443 597 "Sherwood green metallic"
-- B-S '71 Pntd. GK6 Medium Bronze Met. 3443 599 "autumn bronze metallic"
-- B-S '71 Pntd. FE5 Red 3443 601 "rallye red"

13-64-0 Front Bumper Face Bar
13-64-3 Bar
-- B '71 Bright Blue 3464 250 GB5 - "true blue metallic"
-- B '71 Avacado 3464 875 FJ6 - "sassy grass green"
-- B '71 Citron Yella 3464 876 GY3 - "curious yellow"
-- B '71 Plum Met. 3464 877 FC7 - "in-violet metallic"
-- B '71 Tor Red 3464 878 EV2 - "tor-red metallic"
-- B '71 Red 3464 879 FE5 - "rallye red"

13-66-0 Rear Bumper Face Bar
13-66-3 Bar
-- B '71 Red 2962 391 FE5 - "rallye red"
-- B '71 Citron Yella 3464 883 GY3 - "curious yellow"
-- B '71 Plum Met. 3464 884 FC7 - "in-violet metallic"
-- B '71 Tor Red 3464 885 EV2 - "tor-red metallic"