Is there a way of changing the color of the choice options under dropdown menus and continuous sum total.-from blue to black.
The highlight color of options in a dropdown menu cannot be changed easily or reliably. I assume this is what you are talking about since you mentioned changing from blue.
I am confused on the issue of the continuous sum total since it would not normally have a blue color to start with. Do you want to change the text color, or the background color. You can do either or both with some CSS.
On the Style tab, scroll to the bottom and click on the HTML/CSS Editor link, then add something like the following:
Let me know if you meant something other than the highlight color in the dropdown menus. The background color when not highlighted (and many other features) can be changed.