These VIs (GetThemeBrushAsColor.vi and GetThemeTextColor.vi) get the colors from Mac OS X directly.
These VIs utilize the Call Library Function Node to directly grab all of the information needed from the OS for the different colors. The Call Library Function Node needs necessary input parameters to return the Theme Brush color, the Theme Text color, or a series of system colors from the OS directly which can be seen in the SubVIs included in the Zip folder. Another example which is included in the Zip folder is an example which shows you what system colors change when you change the system appearance.
Steps to Implement or Execute Code
Change the system colors: Apple Menu » System Preferences » Appearance
Launch LabVIEW, open SystemColors.vi
Run the VI, and observe the resulting system colors
Right-Click on System Colors on the front panel and select Data Operations » Make Current Value Default