It uses whatever colors are the system colors for the machine it is actually running on. So it would uses the colors from system B.
Likewise for fonts. If you uses any of the symbolic fonts like dialog, application, ... and they are tied back to the system fonts of dialog, application, menu (I might have those names wrong or mixed up) by way of LabVIEW's or the exe's "app" .ini file, it will use whatever the Windows fonts are. This can cause problems for an application where the front panel was sized based on an older OS where the system fonts were different and smaller when the app gets run on a newer OS such as Win7 where the font is something else, but also larger by a point or two.
