This may be helpful to you. I've had it for years and successfully relied on it time and again. (I apologize in advance if the formatting gets weird -- it doesn't copy and paste well on forums so call me if you have questions about something.)
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Mopar Chassis Color Chart
Legend:
BC: Body Color
GB: Gloss Black
SB: Semi-gloss Black
CI: Cast Iron Gray
N: Natural Steel or Aluminum
MP: Manganese Phosphate
CC: Color Code
(*): Some Mopar core supports are body color with semi-gloss black sprayed on the grill side. There are some variables from what is shown above.
Assembly: Front Unibody subframe assembly BC
Inner Fenders BC
Firewall BC
Core Support BC*
Transmission Components: Transmission N/CC
Driveshaft N/CC
Transmission and driveshaft Yoke N/CC
Differential Housing SB
Clutch Linkage N
Brake Components: Brake Drums SB/N
Disk Brake Shields N
Calipers CI
Master Cylinder GB or CI
Axle/Suspension Components Axles N/CC
Third Member SB
Upper Control Arm GB
Lower control Arm GB
Inner and Outer Tie Rods N/CC
Tie Rod Adjustment Sleeve SB
Center Link MP/CC
Idler Arm/Bracket CI/CC
Suspension Components(con’t) Strut Rods CI/CC
Torsion Bars GB/CI/CC
Shocks SB/CC
Rear End U-Bolts N/CC
Rear Leaf Springs N/SB/CC
Backing Plates GB
Spindles CI/CC
Anti-Sway Bars N/CC
Steering Components Pitman Arm CI/CC
Steering Box N/CC
Exhaust Systems Muffler Hangers and Clamps N
Exhaust System and Mufflers N
Gas Tank Components Gas Tank N
Gas Tank Straps N/GB
Gas and Brake Lines N