The paint code can be found in the engine compartment on the driver's side strut tower as shown below. The paint code is in the lower left corner on the black label (shown here Imolarot (Imola Red) 405) in German of course. 405 equals Imola Red.

Some common BMW Z3 Color Codes are: 267 - Dacar Yellow, 275 - Boston Green, 297 - Montreal Blue, 300 - Alpine White, 303 - Cosmos Black, 306 - Atlanta Blue, 307 - Dark Green, 308 - Brilliant Red, 309 - Arctic Silver, 314 - Bright Red, 335 - Estoril Blue, 337 - Dakar Yellow II, 354 - Titanium Silver, 362 - Siena Red, 364 - Topaz Blue, 400 - Steel Grey, 405 - Imola Red, 415 - Bright Red II, 418 - Impala Brown, 430 - Oxford Green, 448 - Laguna Seca Blue, 472 - Sterling Grey, 475 - Black Sapphire, 668 - Jet Black/Black II. If your specific color code number is not found here, please enter your paint code and description in the Text Entry box.

An example of Roadster Solutions Stone Guards painted white (barely noticeable) to match the Z3: