Copy all the files that are in the folder “Theme Colors” to this folder :
WINDOWS 7 / 8 / 10
- Open Folder Options by clicking the Start button, clicking Control Panel, clicking Appearance and Personalization, and then clicking Folder Options.
- Click the View tab.
- Check the box to the left of Show hidden files, folders and drives, click Apply, then click OK.
Windows 8 & 10
- Open File Explorer/Windows Explorer
- Click View then select Options
- In the Folder Options window, choose View, select Show hidden files, folders, and drives, and then click OK
ON MAC OFFICE
/Users/ Username/Library/Application Support/Microsoft/Office/User Templates/
My Themes/Theme Colors
~/Library/Group Containers/UBF8T346G9.Office/User Content/Templates