To change the calendar background, click the Calendar Background link in the Template items list.
On the right side of the screen, there are several options for modifying the Calendar Background.
Background/Text Select Color
Click on the Select Color button to select a color.
The Color Picker appears. Click on a color square, and then click the Select Color button.
The new color is displayed in the custom template. (You may have to click Save Option before it appears.)
NOTE: Advanced users can enter hexadecimal code directly into the text field next to the Select Color button.
Save Option
When you have chosen the options you want, click the Save Option button to save your changes.
Reset
Clicking the Reset button will wipe the template and make it completely blank. (You can also go back to the Templates menu tab and re-select the template to begin over again.)
Activate
You can also click the Activate button to active your custom template. (Then you can click the View Blog menu tab to see how it looks).