Double click on the 'credits' clip you made to get back into the
'title/credits' area for editing. Under 'change the text font and color'
selection you will see the word 'color' near the top...and right underneath
that the letter A and just to the right a filled in square. if you click on
the A you can change the text color, and if you click on the square you can
change the background color to what you are looking for. Good luck.