Imagine black Dahlia's in the place of the white mums--deep blue hydrangea instead of white--no snowflake-duh and black branches. Put it in the mercury glass (mirror silver) vase. Pretty and very simple and adds a nice element of height.
For a cheery springtime bouquet, white daisies are a great go-to—whether they're being used as a filler flower or making up the entire arrangement. They naturally grow white blossoms, but thanks to silk, can be found in nearly every color if the rainbow.