A few wedding ideas to follow this color scheme:
Red roses, red dianthus, light blue delphinium, pink heather, 'garnet glow' mini callas, hypericum berries.
A boutonniere of red hypericum berries, pink heather and salal leaf with ribbon accent;
A flower girl halo below of heather, boxwood and hyacinth blooms secured with silver bouillon wire. Texture with minimal weight is more comfortable for little girls (and increases the chances they will wear it for the entire ceremony!)
and an even deeper contrast with bright and dark blues, plum purple and shades of reds and burgundy.