Judi, I think most of the issues is that we almost always deal with color rather then B&W or Sepia. After looking at the original color image, I now understand why you made those decisions as to the tonal values of the background. I took the opposite point of view, and tried to make your image look more older and those less saturated, where the range of tones would be a lot less. Softening the white flower just makes it blend as if your picture was taken in the 50s or mid 60s.
Now your color image is just so much more vibrant. The purple flowers add to, not subtract, as the bokeh background works perfectly.
Every monitor/screen that's not calibrated is more a crap shoot then anything else. I downloaded two simple charts that lets me adjust my screen so that I can see the full tonal range from white to black. My graphics card, which is built into the motherboard, doesn't allow me much options or adjustments, so I went with quality rather then fps for gaming.
BTW, if that's your daughter in your avatar, she's adorable.