The style of a cell in a dataview can be modified with the class and style properties on the particular cell. With the class property a class defined in the theme being used can be attached to the cell. With the style property css can be embedded in the form.
The background-color of a cell can be changed with the css property 'background-color'.
Example: to change the background color of a cell to red, the style property should be set to
background-color: red or
The align of a label inside a cell can be changed with the css property 'text-align'.
Example: to align a label inside a cell to the left, the style property should be set to
Multiple css properties should be seperated with a semicolon.
Example: to have a red cell with left-aligned text, the style property of the cell would be
background-color: #f00; text-align: left.
More css properties along with a description can be found here: http://www.w3schools.com/CSS/CSS_reference.asp.