Whitespace is important - the subtle use of blank space to group data into columns and rows is the most effective method. We ensure this by using a data height of 9pt and a row height of 30px. At Jedox, we are not (yet) able to define the white space via direct formatting of the cell e.g. through the addition of padding - therefore we add blank columns and rows of 5px around the data cells instead:
An input cell differentiates itself from a normal cell and indicates the user that the content of the cell can be edited. It's background is the light gray (#F5F5F8) and it has a signifier placed in the left bottom corner of the cell.