Your Data Plate should be on the drivers side pillar that your door shuts on. Your Data Plate should tell you what color combination your Tbird left the factory with. It should be something that has the code of your Blue color and the code for your White color, which is Code E for Corinthian White on a '59. So it could be, for example, CE for C=Baltic Blue and E=Corinthian White. The first letter always indicates the color of the body, and the second letter the color of the top. It could be JE for Steel Blue and Corinthian White. Or NE for Starlight Blue and Corinthian White. Look at your Color code on your Data Plate and it should tell you what the code is. Here is a link to the '59 Color Codes.
And yes, the trunk color should certainly be the same color as the body of the car.