When selecting a color table to attach to the master file it does not appear to be attached or affect the reference file colors or when you create a drawing view the color of the object in the Master file is not the color that is set to the same as the model in references.
Steps to Accomplish
Below is the workflow to make the reference file use the same color table as the master file.
1> Choose File > Settings > User > Preferences > Reference and enable the Use Color Table option.
If disabled, OpenBuildings Designer ignores any color table attached to a reference and displays the elements in it using the active design file's color table. This speeds up loading design files with references attached but may change the colors in which the elements in the references are displayed. The default is on. A change is not effective until OpenBuildings Designer is restarted.
2> We can override the Use Color Table user preference (File > Settings > User > Preferences) by creating and setting a configuration variable MS_REFCOLORTABLE.
MS_REFCOLORTABLE = 1, OpenBuildings Designer always uses the reference's color table.
MS_REFCOLORTABLE = # any value other than 1, OpenBuildings Designer never uses the reference's color table.
If MS_REFCOLORTABLE is not defined OpenBuildings Designer uses the user preference to determine whether or not to use the reference's color table.