Cyclamen on Dark Blue

My pink cyclamen will not come forth with buds, it is just all leaves. So much for plant rehab at my house. I still have hope, though, but in the meantime, the white ones will do. I did pay attention this time to the warm temperature of the whites, just getting familiar with the range. I would like to do one where the background is almost the same value, or even actually IS the same, as the blossoms, with just temperature change, so that the flowers are just barely there.