Depending on the paint manufacturer the shade may vary slightly. Some manufacturers refer to the metallics as polys.
Keep in mind that the primer color underneath will affect the final top color. The darker paints aren't as noticeable as the lighter colors are for obvious reasons but there still could be a paint shift between a gray primer, a red primer or a black primer undercoat. This is why some shops will use a lighter primer tinted to the top color as the final primer coat before sealer (if used) and paint.
Here's another pic of an Ivy Green car,
http://www.svs.com/users/zim/mustang/images/66-R.jpg
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1968 Mustang coupe, Acapulco Blue, 289 2v, C-4, Power Steering.
Hopefully a 1969 convertible or Sportsroof (non Mach or Boss) for next Mustang project
Trying to find my father's 1973 Mustang Grande he bought brand new. 3F04F126773 last known registration and title was in New Jersey, 1982.
paint color problem 
