If you are newly creating a sheet, during sheet-creation, you can update its name. If it is already created, in the sheet selector hover over the sheet, hit the 'i' icon, then the settings icon to change the name.
Chart names can be changed by going into the 'Edit' mode.
Alignment is similar, you can drag and drop or resize charts to fit your alignment.
Font colors i believe are not customizable today, unless you plan to go down the route of creating themes.