I use Publisher 2007. Still a relative newbie but here goes, it may help but
if not the experts here will come along and correct us both

If you do not know the colour combination of your text fill box. Click into
Text box that has been filled / Go to drop down menu Text colour / click the
coloured square that you used / click more colours /click custom / note down
the RGB numbers that you used for your text fill. You are now aware of the
combination colours that you used for your text fill.
Now the picture fill. Select your picture / Menu Fill colours / Custom /
Delete RGB numbers and type in the numbers that you used for your Text fill
/ OK it / close. If this is correct / SAVE. Otherwise wait for more
reponses.
Hope I have got it correct.
MoMo (Maureen)