Expected: the yellow table background shows through the gutters. First table has no gutters at all (borders touch), second has 10px everywhere (including around the outside), third has 20px horizontal but only 4px vertical gutters. Fourth: 15px padding inside every cell.
| a | b |
| c | d |
| a | b |
| c | d |
| a | b |
| c | d |
| padded | cells |