When color is applied to table cell border through the Table Borders -> Cell Borders, the thickness of the border is set to 0. This makes the border invisible. Workaround: Change the border thickness manually in the dialog after the color is changed. Steps to reproduce: - Add table with one column - Open from context menu Table Borders dialog - Click on Cell Borders tab - Apply color -> blue - Press OK Expected: The table cell has blue borders applied. Actual: The table cell has no borders.