I have made many belie quilts..I find when using so many colors..the background and the center .Should be solid color to pull it all together..your centers are light enough design wise to be ok...but try some of your flowers on some solid color material..natural. or light tan would give u the effect u are looking for ..I think..since u want the flower to be the main draw to the eye of the looker..a good thing to do also is lay the background material down..put some flowers on top..then step back and look..if your eyes go all over the piece..and are not drawn to one thing...then u are balance with the colors.if something is off u will keep going back to it...when working with so many colors and patterns u have to give a break to it all with the solid connecting pieces..I also love working with hexie. I posted a hexie quilt I just finish a couple weeks ago.it would show u what I mean about the breaking up of color and patterns..