Scored backgrounds can convert a plain white panel to something special. Simply score a white panel with a pattern of scored lines. Score every quarter of an inch, half inch or inch. You can leave them white as embossed or turn the panel over for a de-bossed look. In this card, we highlighted the embossed score lines by dragging an ink pad over them.
The sunflower was stamped, colored and fussy cut from a separate piece of card stock and popped up on the front panel. The card base and label are cut from Kraft card stock.
I believe the rustic background of the inked score lines is perfect for this sunflower card. You might want to try scored backgrounds as a different option for your front panels.