Here are the 71 codes and color names (Dodge & Plymouth used most of the same colors and codes but often tagged them with different names)
High Impact Colors:
Dodge Plymouth (Same for Chrysler)
FY-1 - Top Banana Lemon Twist
GY-3 - Citron Yella Curious Yellow
EV-2 - Hemi Orange Tor Red
EL-5 - Butterscotch Bahama Yellow
FJ-6 - Green Go Sassy Grass Green
FC-7 - Plum Crazy In Violet
Other 71 colors- Non-Impact
Dodge Plymouth (same for Chrysler)
GA-4 Light Gunmetal Metallic Winchester Gray Metallic
GA-8 Dark Gunmetal Metallic Slate Grey Metallic
BG-2 Light Blue Metallic Glacial Blue Metallic
GB-5 Bright Blue Metallic True Blue Metallic
GC-7 Dark Blue Metallic Mood Indigo
FE-5 Bright Red Rallye Red
GF-3 Medium Green Metallic Amber Sherwood Metallic
GF-7 Dark Green Metallic Sherwood green Metallic
GJ-4 Moss Green Metallic April Green Metallic
GK-6 Dark Bronze Metallic Autumn Bronze Metallic
BL-1 Biege N/A Sandalwood or Navajo Beige
FL-6 N/A Aztec Gold Metallic
FQ-5 Turquoise Metallic Coral Turquoise Metallic
GT-2 Tan Metallic Tunisian Tan Metallic
GT-8 Dark Tan Metallic Tahitian Walnut Metallic
GW-3 Bright White Sno White
TX-9 Black Black Velvet Or Formal Black
GE-7 N/A Burnished Red Metallic
GY-9 Dark Gold Metallic Tawny Gold Metallic
GY-8 Gold Metallic Gold Leaf Metallic
GY-4 Gold Metallic Light Gold
GY-5 N/A Crystal Dawn
GM-8 Sparkling Burgundy Metallic
*999 special order, many colors, could be nearly anything
I think Plymouth had a little better marketing effort, look at those names! Enjoy!
*I'll post 1970 codes next, some 70-71 codes were the same but there are MANY one year only colors, example: Panther Pink and Lime Light Green are 1970 only, Curious Yellow and Sassy Grass Green are 1971 only.