split cell not really split

In the style box for the table, append a background-color setting as the default for the entire table, then override on specific cells. That way, you do not have to set a color for each and every cell. That is how I do tables... always set a default on the entire table first.

e.g. background-color: red; in the table style block. (same place as table-layout: fixed)

inserting the table worked for me.