How to change the font and background colours of cells in your Google Spreadsheet?
Change the font color:
Step 1: Select the cells for which you need to change the font color.
Step 2: Click downward arrow near colors option and select the color as shown below,
Step 3: Selected color is set as default color. When you click the color icon selected text will be filled with the chosen color.
Change the background color:
Step 1: Select the cells to add the background color.
Step 2: Click downward arrow near paint bucket tool and select the background color as shown below,
Step 3: Selected color is set as default background color. When you click the paint bucket icon, background of the selected cells will be filled with the default background color.