I thought that the grid patterned paper grounded the large floral image. Stamping the image and the sentiment in the same colour of ink (which is also found in the patterned paper) pulls the elements of the card together.
Stamps: image (PSX), sentiment (CTMH)
Papers: off white cardstock (Core'dinations), patterned (DCWV Mod Retro)
Inks: ColorBox Celadon, Distress Antique Linen
Accessories: fabric brads (K & Co.)